With the development of science and technology，there is no doubt ________ Chinese astronauts will land on the moon in the near future.
#92552
A
whether
B
that
C
what
D
which
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Researchers have found clear and convincing evidence ________ happiness isthe key to better health and longer lives.
#92775
A
where
B
whether
C
how
D
that
Some young people in America are expected to leave ______ could be life’s most important decision---marriage--- entirely up to luck.
#93543
A
which
B
that
C
what
D
as
As your spoken English gets better, ______ your written English．
#93615
A
so does
B
so will
C
nor does
D
neither will
____________ to do the repair, and what you need is only a hammer and some nails.
#93146
A
It is hard
B
That is easy
C
That is hard
D
It is easy