问题描述：
用不定冠词a,an 填空；
1What’s this?It’s__bus.
2Is this__orange orange?Yes,it,is.
3This isn‘t__old bag.It is__pen.
4He is__teacher.
5That is __English car.
1What’s this?It’s__bus.
2Is this__orange orange?Yes,it,is.
3This isn‘t__old bag.It is__pen.
4He is__teacher.
5That is __English car.
问题解答：
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