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
推荐题目
She’ll never forget her stay there ______ she found her son who had gone missing two years before.
#32659
A
that
B
which
C
where
D
when
The question_______ you should take this medicine should be decided by your family doctor.
#31638
A
why
B
if
C
whether
D
that
You can eat food free in my restaurant ______you like.
#33789
A
whatever
B
whenever
C
wherever
D
however
The report shows that we are making progress ________ we need to make greater efforts.
#32307
A
but that
B
but for
C
however that
D
no matter how
Stop making so much noise ____ the neighbor will start complaining.
#80038
A
or else
B
but still
C
and then
D
so that