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一Excuse me，sir．You can’t enter     0ffice without     permission．一But the manager is expecting me．
#9516
A
the；a
B
an；the
C
the；不填
D
不填；不填
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My brother and I have decided to take____ great bike trip to Tibetan and I’m busy planning our schedule for _____ trip.
#8760
A
a; the
B
a; /
C
the; the
D
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_____ 2008 Beijing Olympic Games were _____ success.
#8779
A
The; x
B
The; a
C
x; a
D
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It's quite obvious that the aging population in China will cause       heavy pressure on            ________ whole society in the future．
#8187
A
／；the
B
the；／
C
a；the
D
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In science fiction we read of flying saucers travel through _____ space, so people want to have ______ better knowledge of the universe.
#10403
A
the; a
B
/; /
C
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D
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In the north of China, it has been snowing for weeks on___end, which causes severe damage to crops; it is estimated that the heavy snowfall will come to ____ end next week.
#8326
A
/; an
B
the; a
C
a; an
D
an; /