Electronic devices such as iPods and headphones can do great harm to our hearing if _______ improperly.
#67875
A
being used
B
used
C
to be used
D
having been used
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The time is not far away ________ modern communications will become widespread in China’s vast countryside.
#73339
A
as
B
when
C
until
D
before
--- Don’t look down upon Bob. He has his own advantages. --- Oh, yes. ____ others are weak , he is strong.
#67542
A
When
B
Where
C
While
D
If
One of the most interesting places in Beijing____the foreigners want to visit is the Great Wall.
#74699
A
which
B
that
C
what
D
where