Grammar Revision (Khan academy)

The thesis of Malcolm Gladwell's book Outliers, contrary to what many people might expect, are that opportunity and luck are more important to achievement than a high IQ.

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• is

• were

• have been

Laila and her sister Leen has won the Quraan competition for high school students.

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• have won

• is winning

• was winning

Alexandre Dumas's 19th century novel The Three Musketeers tell dramatic adventure stories about the French royal guard two centuries earlier.

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• tells

• are telling

• were telling

After discovering that children who grow up on farms are less likely to suffer from asthma and allergies, researchers is trying to isolate the compounds in farm dust that lead to this protection.

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• tries

• has tried

• are trying

Flemish Giants, members of one of the largest breeds of pet rabbit, weighs up to 22 pounds.

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• is weighing

• has weighed

• weigh

Everyone in most psychiatric circles agree that daily exercise can enhance mental well-being.

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• have agreed

• were agreeing

• agrees

The calendar and the wheel, each an example of Mesopotamian ingenuity, are among the inventions we often take for granted today.

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• was

• is

• has been

An ice cream sundae, especially when topped with three or four cherries, makes a delicious dessert.

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• make

• were making

• are making

Although calzones often contain the same toppings found on pizza, they wrap those toppings inside a less messy, and more secretive, package.

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• contains

• is containing

• has contained

Reading fiction, cooking from scratch, and spending time in his garden are some of the ways Frank relaxes.

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• is

• has been

• was