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问题 选择题

There was a heavy curtain ________ the light.

A．blocking out

B．preventing from

C．blocking in

D．taking off

答案

答案：A

选择题

当前发展中国家人口迁移的主要方向是

A．农村到城市

B．城市到农村

C．农村到农村

D．城市到城市
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单项选择题

Soon, more of the information we receive via the Internet could come (31) in digital wrappers.

Wrappers are made up (32) software code that’s targeted to do specific things with the data (33) within them, such as helping to define queries for search engines. They also keep (34) from (35) access to that code.

32（）

A.of

B.off

C.on

D.out
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