________ these experiments were successfully completed would we think of going into humans.
#80199
A
If only
B
Only if
C
So that
D
Even if
推荐题目
Come and see me whenever ____.
#81407
A
you are convenient
B
you will be convenient
C
it is convenient to you
D
it was convenient to you
The child tiptoed quietly to the bird. ______ into the forest when he was about to catch it.
#80309
A
Flew it away
B
Away flew it
C
Away it flew
D
Flew away it
(2013·安徽省名校联盟模拟)West of the city , which provides a lot of job opportunities for the local people.
#79951
A
a factory lies
B
does a factory lie
C
is lying a factory
D
lies a factory
—He ought ot have been warned of the danger. —____, but he wouldn’t listen to me.
#84049
A
yes, he ought to
B
So he was
C
So was he
D
So it was with him