It puzzles the scientists _____ some mammals produce their young _____ others lay eggs.
#30772
A
that; while
B
what; while
C
that; as
D
what; as
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(2009·北京)At first he hated the new job but decided to give himself a few months to see ________ it got any better.
#30465
A
when
B
how
C
why
D
if
To enjoy the scenery, Sara would spend long hours on the train ______ travel by air.
#33839
A
as to
B
other than
C
instead of
D
rather than
______ is often the case is that Tom doesn’t study hard and fails in passing an exam.
#31422
A
That
B
What
C
It
D
As
Everyone is different and that is ________ makes our world so much better.
#32293
A
that
B
which
C
what
D
who