题目内容

These flowers must_____once a day.()

A. watering
B. be watered
C. water
D. to water

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Be careful! There are some_____glass on the ground. ()

A. broke
B. breaking
C. broken
D. break

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

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

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. \

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