One thing’s for sure, the fire _____by some cigarette butts. 
#88084
A
might cause
B
could have caused
C
must have been caused
D
should be caused
推荐题目
When I was young, I was told that I ______ play with matches
#90473
A
wouldn't
B
needn't
C
mustn't
D
daren't
       anyone call, tell them I’m in conference.
#86721
A
Should
B
Would
C
Could
D
Might
The officer insisted the young girl______a thief and ordered she______free.
#87505
A
was not;be set
B
should not be;be set
C
was not;was to be set
D
was not;set