Water, which seems to be so simple and common, is ______ makes life possible.
#79453
A
that
B
which
C
what
D
where
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—Don't you think it necessary that he ________ to Miami but to New York?—I agree, but the problem is ________ he has refused to.
#79341
A
will not be sent；that
B
not be sent；that
C
should not be sent；what
D
should not send；what
The reason__________ their failure you know is__________ they didn't get fully prepared for the experiment．
#79456
A
why, that
B
that, why
C
for, that
D
why, because
The question that puzzled them is ____ they can get rid of the air pollution in the area.
#79372
A
how is it that
B
that how
C
that it is how
D
how it is that
The reason _______ he was late was _______ he missed the bus.
#79414
A
why, because
B
why, that
C
that, why
D
because, why