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练习题

a/an，复数-单数和复数形式 a/an, plurals – singular and plural forms
1 It's ____ animal.
A.an
B.a
2 I need ____ new bed.
A.a
B.an
3 It's ____ useful machine.
A.a
B.an
4 I'm ____ waiter.
A.an
B.a
5 Do you have ____ umbrella?
A.a
B.an
6 I'm ____ English teacher.
A.a
B.an
7 I need ____ hat.
A.an
B.a
8 Is she ____ student?
A.an
B.a
9 We have ____ ugly duck.
A.an
B.a
10 I need ____ hour.
A.a
B.an
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