Listening to loud music at rock concerts _____ caused hearing loss in some teenagers.
#85680
A
is
B
are
C
has
D
have
推荐题目
Here is a message of importance to every man and woman who ____.
#86205
A
vote
B
votes
C
are voting
D
voted
--Why does the lake smell terrible? ---Because large quantities of water ______.
#85773
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted