EXERCISE 6 - ADVANCED GRAMMAR FOR TOEFL

_____ begin their existence as ice crystals over most of the earth seems likely.

• Raindrops
• If raindrops
• What if raindrops
• That raindrops

Scientists cannot agree on _____ related to other orders of insects.

• that fleas are
• how fleas are
• how are fleas
• fleas that are

It was in 1875 _____ joined the staff of the astronomical observatory at Harvard University.

• that Anna Winlock
• Anna Winlock, who
• as Anna Winlock
• Anna Winlock then

_____ is a narrow strip of woods along a stream in an open grassland.

• Ecologists use the term "gallery forest"
• What do ecologists call a "gallery forest"
• "Gallery forest" is the term ecologists use
• What ecologists call a "gallery forest"

_____ developed very rapidly in Alabama primarily because of its rich natural resource.

• That heavy industry
• Heavy industry
• Heavy industry that was
• When heavy industry

_____ so incredible is that these insects successfully migrate to places that they have never even seen.

• That makes the monarch butterflies' migration
• The migration of the monarch butterflies is
• What makes the monarch butterflies' migration
• The migration of the monarch butterflies, which is

Art critics do not all agree on what _____ a painting great.

• qualities make
• are the qualities for making
• qualities to make
• do the qualities that make

In order to grow vegetables properly, gardeners must know _____.

• what the requirements for each vegetable are
• that the requirements for each vegetable
• what are each vegetable's requirements
• that is required by each vegetable

When _____ is not known.

• was the wheel invented
• the invention of the wheel
• inventing the wheel
• the wheel was invented

For many years people have wondered _____ exists elsewhere in the universe.

• that life
• life which
• whether life
• life as it