If I ______ about this computer program, a hage amount of time and energy would have been saved.
#87162
A
know
B
knew
C
had known
D
have known
推荐题目
Cars play an important role in modem life, but they also cause many problems like air pollution.
#87845
A
should
B
can
C
must
D
will
She demanded that he _____ the books he borrowed from her.
#87165
A
should return
B
would return
C
returned
D
were to return
. I supported him in time , otherwise he ______ off the bike .
#89506
A
might fall
B
would fall
C
should have fallen
D
would have fallen
It’s quite impossible that it will rain tomorrow. But if it _______, I would still go to the park.
#87809
A
should rain
B
would rain
C
rains
D
had rained
He _____ his parents that he has failed in the exam.
#90078
A
dares not tell
B
dares not telling
C
dare not tell
D
dares not to tell