题目内容

It is a great waste to leave the______water all day long.()

A. running
B. to run
C. run
D. ran

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They are cleaning up the______leaves on the road.()

A. fall
B. falling
C. fall
D. fallen

Keep liquid(液体) away________your camera. ()

A. on
B. to
C. from
D. \

This problem should _______ later. ()

A. be talked about
B. be talking about
C. talk about
D. to talk about

We are looking forward _______ the summer holiday. ()

A. for
B. on
C. from
D. to

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