Unit 4    Planting trees is good for us.

一．单项选择

（  ）1.Tree Planting Day is _____ 12^th March.

A.   on      B. in      C. at

（  ）2.The children enjoy _____ games.

A.   play    B. plays    C. playing

（  ）3.You should _____ the small trees.

A.   take care   B. look after   C. look

（  ）4.People shouldn’t cut_____ trees.

A.   down      B. up        C. for

一．           连词成句

1. keep ,  trees,  us,  can,  cool  (.)

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2. good ,  planting,  for,  is,  trees,  us  (.)

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3. will,  trees,   I,  more,  plant  (.)

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