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Sometimes Daniel walks for half ________ hour to the zoo.
#34419
A
a
B
an
C
the
D
/
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Students in the football class usually play ________ football when school is over.  
#32416
A
the
B
/
C
a
D
an
Mo Yan, ___ famous Chinese writer, became _____country’s first Nobel Literature Prize Laureate(诺贝尔文学奖).
#33696
A
a, a
B
a, the
C
the, a
D
the, 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
/
---I would like to sit in __________ front of the bus.---Me, too. And we can have ________ better view.
#33252
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/, the
B
/, a
C
the, a
D
the, the
This is         key and that is           eraser.
#34020
A
a, a
B
a, an
C
an, a
D
the, an
不定冠词(a,an)
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