about this computer program, a huge amount of time and energy .
#79940
A
Should I know; be saved
B
If I had known; can be saved
C
Had I known; would have been saved
D
Did I know; was saved
推荐题目
_________ did the students realize that they were mistaken about spiders.
#83106
A
It was until then
B
It was not until then
C
Not until then
D
Not until when
--- I am shocked at the news that many pupils were killed in the terrible traffic accident. --- So am I. Little ____ the safety of the poor children.
#81973
A
cared the local government about
B
the local government cared about
C
did the local government care about
D
was the local government cared about
Not until I began to work ______ how much time I had wasted.
#81906
A
didn't I realize
B
did I realize
C
I didn't realize
D
I realize
Only at that time how much time she had wasted.
#81919
A
Mary did know
B
did Mary know
C
does Mary know
D
Mary does know