问题
选择题
He is ___new comer to ___ chemistry but he has made a few important discoveries.
A．/, /
B．a, /
C．a, the
D．the, the
答案
答案：B
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He is ___new comer to ___ chemistry but he has made a few important discoveries.
A．/, /
B．a, /
C．a, the
D．the, the
答案：B