Mike had just finished his lunch and was about to take a break _____ an unexpected visitor came.
#33274
A
when
B
while
C
so
D
for
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He didn't expect that his parents could manage to know ________ is going on in his college life on the Internet.
#30084
A
how
B
which
C
what
D
that
Many workers were organized to clear away_______ remained of the World Trade Center.
#79947
A
those
B
that
C
what
D
where
(2013·黄山高三二模)Some place names have been changing over the years. For example, Jinling in ancient China refers to ________ is now called Nanjing.
#30417
A
that
B
which
C
what
D
whether
you know your potential, you have to rely on many other people to get to where you are.
#33309
A
Since
B
If
C
While
D
Once
China's reform and opening has been going on for ________ is like about 30 years now and it's really quite remarkable.
#30333
A
that
B
which
C
what
D
it