Cars play an important role in modern life, but they ______ also cause many problems like air pollution.
#63554
A
should
B
can
C
must
D
will
推荐题目
It is recommended that the project ________ not be started until all the preparations have been made.
#62972
A
must
B
can
C
need
D
should
It_____ have been Tom that parked the car here, as he is the only one with a car.
#62884
A
may
B
must
C
can
D
should
--- ______ I bring you all the magazines right now?--- No, you don’t have to, but you ______ give them to me tomorrow.
#74955
A
May; can
B
Should; must
C
Can; can
D
Must; had better