题目内容

Taking care of trees, flowers and plants __________ not easy, but very time-consuming.

A. are
B. being
C. to be
D. is

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Learning how to speak to foreigners in languages which is different from people’s mother tongues __________ a very interesting process.

A. are
B. have
C. are
D. is

Some people tomatoes a fruit, while others say they’re a vegetable.

A. think of ; as
B. focus ; on
C. pass ; through
D. take ; off

She gave me a piece of cake in exchange __________ a slice of pizza.

A. from
B. for
C. with
D. over

John, you forgot to do your homework again. Don’t __________ it happen anymore.

A. keep
B. let
C. take
D. get