题目内容

He'll be an astronaut by the time he ______ thirty.

A. is
B. had been
C. will he
D. is going to be

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The native language is a person's（）language.

A. first
B. only
C. one
D. foreign

Walt was （） when be heard the strange sound.

A. reading
B. singing
C. drawing
D. playing

依照我国《婚姻法》的规定，下列属于结婚形式要件的是( )。

A. 符合一夫一妻制
B. 男女双方完全自愿
C. 达到法定结婚年龄
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English is （） used working language in the United Nations.

A. much
B. more
C. the more
D. the most