Doing exercise for hour every day is good for your uncle.A. a anB. an an C. a /D. an

问题补充：

Doing exercise for hour every day is good for your uncle.

A. a, an

B. an, an

C. a , /

D. an , /

答案：

A. a, an

B. an, an

C. a , /

(答案→)D. an , /

解析：此题考查冠词的用法。an用在元音音素开头的名词前面,物主代词和冠词不能同时使用.

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