At least 300 million people are using QQ _________ by Ma Huateng to chat on line.
#45059
A
create
B
creates
C
creating
D
created
推荐题目
The windows must _________ before you leave the room.
#44851
A
be closed
B
are closed
C
close
D
be close
---- May we leave the classroom now? ---- No, you _____. You _____ to leave until the bell rings.
#44917
A
mustn’t, are allowed
B
can’t, aren’t supposed
C
don’t have to, are supposed
D
needn’t, aren’t allowed