Thank you for all your hard work last week.I don’t think we ______ it without you. 
#90551
A
can manage
B
could have managed
C
could managed
D
can have managed
推荐题目
 I’d rather you did some housework when you are free ,but you       .
#88994
A
didn’t
B
shouldn’t
C
weren’t
D
don’t
While watching television, __________.
#90451
A
the doorbell rang
B
the doorbell rings
C
we heard the doorbell ring
D
we heard the doorbell rings