－Do you knowman in white?－Oh, he is scientist from America.A. a; aB. a; theC. the, aD. the

－Do you know man in white?
－Oh, he is scientist from America.
A. a; a
B. a; the
C. the, a
D. the; the

A. a; aB. a; the(答案→)C. the, aD. the; the解析：第一个空，表示特指，故用定冠词the ；第二个空表示泛指，故用不定冠词a 。

和我的回答一样，看来我也对了