—How did she get infected? —She _______ the viruses without any protection．
#12814
A
exposed to
B
had exposed to
C
was exposed to
D
been exposed to
推荐题目
Surfing the Internet is ___ a kind of relaxation, ____ our knowledge.
#12669
A
not more than; adds
B
more than; adding to
C
no more than; adding to
D
more than; adds up to
There has been ____ accidents on this part of road.
#14351
A
a number of
B
a great deal of
C
a series of
D
plenty of
Nowadays，few people form the habit of keeping a supply of candles in the house in case of power ________.
#11468
A
drop
B
lack
C
absence
D
failure