These books should      to the library on time. 
#44981
A
send
B
be returned
C
give back
D
be got back
推荐题目
—When _________ the car _______ ?—Sorry. I don’t know.
#44961
A
does; invent
B
did; invent
C
was; invent
D
was; inventing
— John, you       go out to play until your homework       .  —OK, Mum.
#44766
A
must; finishes
B
can’t; is finished
C
can’t; has finished
D
needn’t; finishes