单项选择题

(Rarely) (we have seen) such an effective actor (as he) has proven himself (to be).

A. Rarely
B. we have seen
C. as he
D. to be
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It was (when) she was (about) (to go) to bed (while) the telephone rang.
A. when
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He was speaking to a stranger (whom), (I think), (was asking) him (something).
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D. something
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