—May we leave classroom now?—No, you        . You        to leave until the bell rings.
#44886
A
mustn’t, are allowed
B
don’t have to, are supposed
C
needn’t, aren’t allowed
D
can’t, aren’t supposed
推荐题目
Today, computers are really helpful. They ____ everywhere.
#44613
A
use
B
are used
C
used
D
were used
----Smoking should ____________ in school. ----I agree. It’s bad for our health.
#44526
A
be allowed
B
not allow
C
allow
D
not be allowed
The computer game _______ well and _______ out very soon.
#44676
A
sells, is sold
B
sells, sells
C
is sold, sells
D
is sold, is sold
Our classroom   _______   by us every day!
#44538
A
is cleaning
B
has cleaned
C
must clean
D
is cleaned