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
People should __________ from __________ down the trees to protect the earth.
#44463
A
be stopped, to cut
B
stop, to cut
C
be stopped, cutting
D
stop, cutting
Stamps ______ sending letters.
#45020
A
used to
B
are used to
C
are used for
D
are using
He ______ as a national hero for winning the first gold medal for his country in the Olympics.
#44754
A
considered
B
was considered
C
has considered
D
has been considered