Instead of giving negative criticism, our teachers usually try to give us ______ feedback so that we can improve on our papers.

A study shows that the chance of an accident is much higher for drivers who are ______ in phone conversations while driving.

Mike trembled with ______ and admiration when he saw the magnificent view of the waterfalls.

Ms. Chen has a large collection of books and most of them are quite heavy; she needs a bookshelf______ enough to hold all of them.

The athlete rolled up his sleeves to show his ______ forearms, thick and strong from years of training in weight-lifting.

Suffering from a serious financial crisis, the car company is now on the edge of ______, especially with the recent sharp decrease in its new car sales.

After the rain, the meadow ______ under the sun with the droplets of water on the grass.

The Great Wall of China was originally built to ______ the northern border of the country against foreign invasion.

A mad scientist in a novel is often portrayed as a wild-eyed man with crazy hair, working ______ in a lab full of strange equipment and bubbling test tubes.

The fashion industry in Africa has witnessed tremendous growth in recent years. African fashion design has caught the eyes of international celebrities including former US first lady, Michelle Obama, Rihanna, and Beyoncé,   11  .

Folake Folarin–Coker, founder of Tiffany Amber, is one of the best-known fashion designers in both the African and global fashion industry. Born in Lagos, Nigeria, she received her education in Europe,   12   she got an opportunity to interact with various cultures at a young age.

  13  , she has a master’s degree in law from Switzerland, but as fate would have it, her passion for fashion led her into fashion design.

Folake’s tasteful and colorful creations have earned her global   14  , making her the first African fashion designer to showcase her talent at the New York Mercedes Fashion Week for two consecutive years.

She has also been widely   15   in international media such as CNN. In 2013, she was listed as one of the Forbes Power Women in Africa.

These cable systems, faster and cheaper than satellites, carry most of the intercontinental Internet traffic. Today, there are over 420 submarine cables   16  , stretching over 700,000 miles around the world.

Today, there are over 420 submarine cables in service, stretching over 700,000 miles around the world. It is not a new phenomenon,   17  . The first transcontinental cable—laid in 1854—ran from Ireland to Newfoundland, and made telegraph communication possible between England and Canada.

Currently, the world’s highest-capacity undersea Internet cable is a 5,600-mile link between the US and Japan.   18   named “FASTER,” the cable connects Oregon in the US with Japan and Taiwan.

The submarine cables require extra   19   to install. They must generally be run across flat surfaces of the ocean floor, and stay clear of coral reefs, sunken ships, fish beds, and other general obstacles.

They must generally be run across flat surfaces of the ocean floor, and stay clear of coral reefs, sunken ships, fish beds, and other general   20  . The fiber-optic cables are also very fragile, so they are surrounded with layers of tubing and steel to prevent damage.

At the top, four exhibit pavilions and a visitor center form the heart of an eleven-building complex. The museum was originally constructed to   21   the vast art collection belonging to oil tycoon J. Paul Getty.

Today, it is stocked with so many art works that the exhibit arenas can show just a part of them at a time, making the   22   special exhibitions a highlight of any visit to the Getty.

The Center’s award-winning architect, Richard Meier, did an outstanding job of creating a public space that has   23   many visitors. Visitors go to the Getty thinking they are visiting a museum with works of art on the inside.

What they discover instead is a work of art with a museum inside. The idea is interesting: The outdoor space can be a completely satisfying   24    experience.

Meier took a few basic   25  : metal, stone and glass. Working with a billion-dollar budget, he combined them to create a work of architecture that can excite visitors as much as the art collection inside does.

Around every corner and at every   26  , there is a new view to enchant guests. And then, just when they think they have seen it all, a new fountain or landscape pops up.

The building stone is travertine,   27   from Italy, the same source as for the historic buildings in Rome.

A special cutting process exposes the fossils long buried inside the stone, which reveals the delicate treasures   28   under the rough surface.

Some of them are set as “feature” stones scattered about the site, waiting to   29   those who find them. The most fantastic one is on the arrival plaza wall, across from the tram station.

In addition to museum tours, the Getty also provides various free on-site tours, including tours of the gardens. These   30   are a must for anyone interested in learning more about Meier’s techniques and ideas.

There he spent a sheltered and academic life for the rest of his days.

  31   He made his observations from a tower situated on the protective wall around the cathedral.

In 1530, Copernicus completed his famous work De Revolutionibus, which later played a major role in changing the philosophical view of humankind’s place in the universe.   32   

Copernicus died in 1543 and was never to know what a stir his work would cause. In his book, he asserted that the Earth rotated on its axis once daily and traveled around the Sun once yearly.   33   People then regarded the Earth as stationary, situated at the center of the universe, with the Sun and all the planets revolving around it.

Copernicus’ theory challenged the long-held belief that God created the Heavens and the Earth, and could overturn the core values of the Catholic world.   34   Other ministers quickly followed suit, saying of Copernicus, “This fool wants to turn the whole art of astronomy upside down.”

Ironically, Copernicus had dedicated his work to Pope Paul III.   35   The Church ultimately banned De Revolutionibus, and the book remained on the list of forbidden reading material for nearly three centuries thereafter.