These days students in some schools ______ not to use mobile phones. 
#44924
A
ask
B
asked
C
are asked
D
were asked
推荐题目
May we leave the classroom now? No, you _____. You_____ to leave until the bell rings.
#44732
A
mustn’t, are allowed
B
don’t have to , are supposed
C
needn’t , aren’t allowed
D
can’t , aren’t supposed
Old people should ________politely.
#44728
A
be spoken to
B
speak
C
speak to
D
to be spoken
Trees ________ every year to make our city greener.
#44941
A
plant
B
are planted
C
were planted
D
will be planted