The lesson drawn from the coal mine accidents is that safety measures are so important that we _____ take them too seriously.
#87972
A
can’t
B
should
C
mustn’t
D
shall
推荐题目
“Do you think he is lazy?” “I _________ so once, but I don’t now.”
#89120
A
may have thought
B
can have thought
C
may think
D
might think
The boss ordered that the work ______ right away.
#88012
A
should finish
B
finished
C
would be finished
D
be finished
He said he would come to attend the lecture if he ___________ time.
#87404
A
has
B
has had
C
will have
D
had
Jack _____ yet, otherwise he would have telephoned me.
#89350
A
mustn’t have arrived
B
shouldn’t have arrived
C
can’t have arrived
D
needn’t have arrived
Tom’s mother often requires that he more time in studying English every day．
#89977
A
spend
B
spends
C
spending
D
spent