number of people who use English as second language is increasing in China.A. A; aB. A;

number of people who use English as second language is increasing in China.
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：考查冠词用法。第一空是固定词组the number of…的数量；另外一个短语a number of许多，大量；第二空的结构为：“a/an 序数词”再，又；句意：使用英语作为又一门外语的人的数量在中国正在增加。故C正确。

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