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Maria would like            orange, not            orange juice.
#33287
A
a; the
B
/; an
C
an; /
D
an; an
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—The presidents of China and Russia had ____ interview a short time ago.—And it was ____ great success.
#34209
A
an, the
B
the, a
C
an, a
D
the, /
This is         3-D printer. And this is an artificial (人工的) ear. Can you believe that scientists printed this artificial ear by this 3-D printer?
#33175
A
a
B
an
C
the
D
/
-Are you going to Beijing by ______ train?-No. I’m taking ______ car. 
#33217
A
/;a
B
A; the
C
/; /
D
the; a
Teenagers should learn to protect (保护) ______from all kinds of dangers.  
#32762
A
them
B
they
C
their
D
themselves
     book on the desk is    useful one. 
#34608
A
The; an
B
A; a
C
The; a
D
The; /
不定冠词(a,an)
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