题目内容

How old _____your teacher?

A. be
B. are
C. am
D. is

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My friend____shells.

A. collect
B. collecting
C. collects
D. x

The boy ____ ill today.

A. are
B. is
C. be
D. am

——Do you like these computers?——No, I don't like_______.

A. it
B. them
C. they
D. their

Which ____ bigger, the sun or the moon?

A. are
B. be
C. is
D. x