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用不定冠詞a或an填空。

1.Maths is ________ useful subject.You can't drop it, I think.

2.It is ________ long time since we met last.

3.Tom's father is ________ artist and his mother is ________ engineer.

4.Last Sunday we had ________ good time.

5.There are only two letters in the word“us”, ________“u”and ________“s”.

6.Before he became ________ university student, he was ________ army man.

7.I spent ________ hour and ________ half writing the composition.

8.Do you have ________ answer to my question?

9.Have you got ________ ten-yuan note?

10.The car has ________ ugly colour.

答案:a;a;an,an;a;a,an;a,an;an,a;an;a;an
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