--Listen! Someone is knocking at the door.-- ______ be Mary. She has just been to Beijing
#89781
A
She mustn’t
B
It can’t
C
It must
D
She may
推荐题目
--- Jack fell off the ladder yesterday，but he is all right now. ---What a lucky dog! He ________himself badly.
#86414
A
should injure
B
might injure
C
should have injured
D
could have injured
—How did your mathematics exam go？—I thought I ，but in fact I fell behind in the class.
#87779
A
should have been the top 10
B
could have been the top 10
C
may have been the top 10
D
need have been the top 10
_______ it be true that the road is being blocked at this moment, for cars are moving like snails inch by inch
#88129
A
may
B
should
C
can
D
must
These achievements_______ without the contribution of Qian Xuesen, a key leader of the New China's nuclear, missile and so on．
#89859
A
would have been unthinkable
B
would not be unthinkable
C
would be unthinkable
D
would not have been unthinkable
But for those interruptions, the meeting _____ half an hour ago.
#86655
A
was finished
B
would have finished
C
would finish
D
had been finished