(2014·宝鸡三检)By the time the girl comes back to life,scientists probably________a cure for this incurable disease.
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A
will have discovered 
B
are discovering
C
will be discovering 
D
have discovered
推荐题目
In the past 5 years a great deal of money _____ improving the environment of the school.
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A
is spent
B
has been spent
C
was spent
D
had been spent
The key you have just got     the front door. 
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A
is used to opening
B
is used to be opened
C
is used to being opened
D
is used to open