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Doing exercise for _________ hour every day is good for our health.
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A
/
B
a
C
the
D
an
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____ old man behind Mary is _____ university teacher.
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A
An, an
B
The , a
C
A , the
D
The , an
Teenagers should learn to protect (保护) ______from all kinds of dangers.  
#32762
A
them
B
they
C
their
D
themselves
---How was ________ dinner at Mike’s house?          ---It was great. Mike’s mum is _________ wonderful cook.
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A
a; the
B
the; a
C
the; the
D
a; an
Have you heard of ______ news? The price of ______petrol(汽油)is rising again.
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A
the; the
B
/; the
C
the; /
D
/; /
     book on the desk is    useful one.
#34608
A
The; an
B
A; a
C
The; a
D
The; /