They are putting too much carbon dioxide into the atmosphere, ______ prevents heat from escaping from the earth into space.
#31962
A
what
B
that
C
which
D
who
推荐题目
It is considered unwise to give a child _______ he or she wants.
#33105
A
however
B
whatever
C
whichever
D
whenever
. ______ they obtain from the activities is very important to the training in their character.
#34774
A
That
B
Which
C
What
D
How
How can you expect to make progress ______ you never listen in class?
#33457
A
before
B
until
C
though
D
when
Some people have the idea_____ you can cross Canada in less than five days.
#31959
A
what
B
that
C
which
D
when