Only when we failed ________ the importance of study.
#81037
A
we realized
B
we had realized
C
did we realize
D
had we realised
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Generally speaking, according to the directions, _____ the drug has no side effect.
#83822
A
when taken
B
when taking
C
when to take
D
when to be taken
_________ the floor, I found his pen lying on the ground.
#82531
A
While sweeping
B
While swept
C
If sweeping
D
If swept
Not until he promised to return it to me as soon as possible ____ my electronic dictionary to my classmate.
#80921
A
had I lent
B
did I lend
C
I had lent
D
I lent
In ________ , but out ________ again.
#562
A
came the teacher; he went
B
came the teacher; went he
C
did the teacher come; he went
D
the teacher came; went he