—Where _____ Mary have put the empty bottles? — She _____ them away. They must be somewhere. 
#63263
A
can; can’t have thrown
B
must; needn’t
C
must; must have thrown
D
can; mustn’t have thrown
推荐题目
 I’d rather ________ than _________
#76019
A
watch TV, go to the cinema
B
watching TV, going to the cinema
C
to watch TV, go to the cinema
D
watch TV, to go to the cinema
The young trees should ______well as often as possible.
#75249
A
be water
B
watered
C
watering
D
be watered