With the development of science and technology，there is no doubt_____Chineseastronauts will land on the moon in the near future.
#78558
A
whether
B
that
C
what
D
which
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livemocha. com is a free site _______ visitors can not just learn languages but also chat online.
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A
that
B
where
C
which
D
what
________ is often the case with elder people, my grandma talked about my new hairstyle for at least 50 minutes nonstop.
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A
That
B
Which
C
As
D
It
My uncle has a lot of books, _______ are about computer science and technology.
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A
most of them
B
most of that
C
most of which
D
and most of which
She showed the visitors around the museum, the construction________had taken more than three years.
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A
for which
B
with which
C
of which
D
to which