People were not allowed to enter the rea

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问题选择题

People were not allowed to enter the reading room because it .

A．had been painted

B．was being painted

C．was painting

D．painted

答案

答案：B

判断题

煤矿企业每年雨季前必须对防治水工作进行全面检查。

选择题

In order to make our city green, ______.[ ]

A. it is necessary to have planted more trees.

B. many more trees need to be planted.

C. our city needs more trees.

D. we must plant more trees.