John’s success has nothing to do with good luck. It is years of hard work _______has made him a great scientist today.
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A
that
B
when
C
which
D
why
推荐题目
How can you expect to make progress ______ you never listen in class?
#33457
A
before
B
until
C
though
D
when
The research also raises the question ________ children from low-income, less educated families need earlier aid.
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A
what
B
that
C
when
D
whether
_______environmental damage is done, it takes many years for the ecosystem to recover.
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A
Even if
B
If only
C
While
D
Once
There’s now a consensus nearly all over the world _____ we’re facing a fragile world peace.
#33571
A
where
B
which
C
that
D
what