You have to stay behind if your homework         before five o'clock.
#44375
A
wasn’t done
B
hasn’t done
C
doesn't do
D
isn't done
推荐题目
Please don’t stand up in class _____ you ______.
#44549
A
until ; are told to
B
when ; are told
C
after ; were told
D
before ; were told to
 The 30th London Olympic Games ____________ on July 27th, 2012.
#44703
A
will be held
B
is held
C
was held    
D
has been held
The radio says a wild animal zoo is going to ____ in our city. 
#44930
A
be built
B
built
C
build
D
be building