According to the statistics, listening to loud music at rock concerts ______ hearing loss in some teenagers in the past 2 decades.
#85876
A
have caused
B
caused
C
had caused
D
has caused
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—I called you at 5:00 yesterday afternoon, but no one answered.—Sorry, I with my parents ________ at that time.
#43430
A
was shopping
B
were shopping
C
are shopping
D
went shopping
--_____ of the population of the city _____workers? --About 60 percent.
#86083
A
What; is
B
What; are
C
How much; is
D
How much; are
All possible means to save the wounded soldier.
#86247
A
has been tried
B
have been tried
C
is to be tried
D
are trying