It is pretty well understood __________controls the flow of carbon dioxide in and out the atmosphere today.
#74032
A
that
B
when
C
what
D
how
推荐题目
The humans are destroying nature day by day, ________ of course, will cause severe punishment from it sooner or later.
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A
who
B
when
C
on which
D
which
(2011·辽宁，32)When the news came ________ the war broke out，he decided，to serve in the army.
#67302
A
since
B
which
C
that
D
because
He started early _______he could get there before nine
#67727
A
in order that
B
because
C
so as to
D
in order to
(2013·安徽，21)From space, the earth looks blue.This is ________about seventy－one percent of its surface is covered by water.
#67309
A
why
B
how
C
because
D
whether
There was ________ time ________ I hated to go to school.
#74350
A
a; that
B
a; when
C
the; that
D
the; when