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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单项选择题
(Whether) he is coming (or not) (don't) matter (too much).
A．Whether
B．or not
C．don't
D．too much
单项选择题
Of the two lectures, (the first) was by far (the best) one, partly because the person who delivered (it) had (such a) pleasant voice.
A．the first
B．the best
C．it
D．such a
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