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_______________ is the population of China?

A. Who B. How many C. How much D. What

This classroom is three times as __________ as that one.

A. big B. bigger C. biggest D. the biggest

Don’t take photo in the museum! You ___________ follow the rules.

A. can B. must C. cannot D. mustn’t

Which one is________ in your school, football or basketball.

A. popular B. more popular

C. the most popular D. most popular

Of all the students in his class, Xiao Ming writes_______________.

A. very careful B. the most careful

C. most carefully D. much more carful

I planned ________ in the park with my family last weekend.

A. camp B. camping C. to camp D. camped

The football team worked hard _________ they would win the match

A. if B. so that C. as soon as D. because

–I called you up at 8:00 last night, but you didn’t answer the phone.

--Oh, really? I ________with the housework.

A. am helping B. helped C. help D. was helping

The mom was so young that she was always worried about how to ______ her baby.

A. look up B. look for

C. look after D. look in

He was reading a book while his mom_______________.

A. cooks B. is cooking C. cooked D. was cooking