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Mary writes       e-mail to David. She found        keys. 
#33050
A
a; him
B
an; his
C
a; her
D
an; he
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--- Why did you laugh just now?--- John wanted to tell us      very funny joke, but he forgot      end himself.
#33390
A
/; the
B
a; an
C
a; the
D
the; the
—Could you pass me _____glass on the table please? —Sure, but it’s _____empty one.
#32737
A
the, an
B
the ,the
C
the , a
D
a, an
There was     interview with Yao Ming on CCTV-5 yesterday evening. But it was a pity that I missed           beginning. 
#32513
A
an; a
B
an; the
C
a; the
D
the; the
It’s ________pleasure for me to be invited to play the piano at the concert.
#34427
A
a
B
an
C
the
D
/
What’s this? It’s        “Nn” and       “u”.
#33607
A
an, an
B
a, a
C
a, an
D
an, a
不定冠词(a,an)
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