David wants to be engineer while Cathy wants to be doctor.A. an; theB. the ; theC. an; a

发布时间：2020-08-17 00:13:19

David wants to be      engineer while Cathy wants to be      doctor.
A. an; the
B. the ; the
C. an; a
D. the;

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A. an; the
B. the ; the
(答案→)C. an; a
D. the;
解析：考查冠词。本题使用不定冠词a/an+单数名词泛指一类职业.句意：David想做工程师，而Cathy想做医生。故C正确。
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