Many a student ____ wearing MP3 players while walking on the street.It’s quite dangerous.
#74707
A
is used to
B
are used to
C
was used to
D
were used to
推荐题目
The house is finished at last. All their hard work has ________.
#71586
A
paid back
B
paid up
C
paid off
D
paid for
How many nationalities ______ the  country   ______? 
#71995
A
is; consisted of
B
does; make up
C
is; made from
D
does; consist of