What do you mean by saying there are only ten tickets?There         be twelve.
#87596
A
could
B
should
C
would
D
can
推荐题目
You look very tired. You ____ late last night.
#87853
A
needn’t sit up
B
didn’t need to sit up
C
shouldn’t sit up
D
needn’t have sat up
. If only I ________ how to operate an electronic computer as you do. 
#89384
A
had known
B
would know
C
should know
D
knew
You look so tired tonight. It is high time you_________.
#90004
A
went to bed
B
went to sleep
C
go to bed
D
to sleep