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问题 选择题

下列生活中的做法正确的是（　　）

A．干冰易升华做制冷剂

B．用甲醛水溶液泡制水产品并出售

C．自行车露天放置，日晒雨淋

D．长期饮用蒸馏水对身体健康有益无害

答案

答案：A

选择题

37.After _______ the area for three hours, the police found the truck near a river.

A．searching

B．searching for

C．in search for

D．looking for
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选择题
— I felt it very difficult to carry on the work all by myself.
— I could have helped you, but you _____ me to.

A. hadn't asked
B. didn't ask
C. haven't asked
D. don't ask
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