It is already well understood___________ causes the global warming.
#70555
A
what
B
when
C
how
D
that
推荐题目
House prices vary from place to place and are usually high ____ there are famous schools.
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A
since
B
when
C
whether
D
where
News came __________ the H1N1 virus may spread more quickly than was thought.
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A
when
B
where
C
which
D
that
The small mountain village we spent our holiday last month lies in is now part of Hubei .
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A
which where
B
where, what
C
that , which
D
when , which
You can only be sure of_________ you have at present; you cannot be sure of something _____ you might get in the future.
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A
that; what
B
what; /
C
which; that
D
/; that