The research is so designed that once________nothing can be done to change it. 
#5001
A
begins
B
having begun
C
beginning
D
begun
推荐题目
.The man founded a charity(慈善事业)_____________ his late wife.
#4765
A
in memory of
B
to remember
C
for the memory of
D
to the memory of
—Sorry, do you mind if I smoke here? —Yes,            
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A
you could
B
go ahead
C
I do
D
my pleasure
But for the leadership of our Party and our Government, we __________ these splendid results.
#4954
A
have achieved
B
shouldn’t have achieved
C
should have achieved
D
would achieve