The Great Wall was built to keep ______  the invaders. 
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A
in
B
out
C
up
D
off
推荐题目
I’m writing to you and ask whether you’d like to give us ___ how to learn English.
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A
some advice on
B
some advices about
C
an advice about
D
advices on
What a wonder! They have finished     40% of the task within one week.
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A
no more than
B
no less than
C
not more than
D
much less than
If you cheat in the exam, you’ll never_____ it.
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A
keep up with
B
get away with
C
get down to
D
look forward to