题目内容

______ preparing dinner, she stood at the from door waiting for her children to return.

A. To finish
B. Having finished
C. Having been finished
D. Finished

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Because of the thick smog, many people move to Sanys in Hainan, believing it would be a wonderful place to ____in.

A. live
B. living
C. be living
D. be lived

说明以下概念模拟信号、数字信号、编码、解码。

Nowadays the English majors are ______ girls,though there are some boys.

A. most
B. much
C. mostly
D. many

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