We are supposed to plant more trees. They help to the wind and sand.

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We are supposed to plant more trees. They help to the wind and sand. [ ]
A. keep away
B. keep out
C. keep up
D. keep off

答案

举一反三

－Could you please _ the light when you leave?
－Sure, I will. [ ]
A. turn down
B. turn off
C. turn up
D. turn on

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He has never _____such a strange thing.              [     ]
A. hear
B. heard
C. hear of
D. heard of

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lt"s so cold outside. Put on more clothes. They can _____ the cold.
[ ]
A. keep on
B. keep out
C. keep up
D. keep away

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She _____ the fire and helped the child out.          [     ]
A. put on
B. put down
C. put up
D. put out

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He provides food for the hungry children.（同义句转换）
He _____ the hungry children _____ food.

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