life will continue on the earth for millions of years to come will depend on the problem of pollution can be solved.
#30117
A
How /whether
B
That/that
C
Whether / if
D
Whether / whether
推荐题目
The days ____we spent together on the farm are not easy ______．
#34475
A
when,toforget
B
which, to be forgotten
C
that, to forget
D
/,to be forgotten
Children of this age should be reminded of________ to do in public places.
#30654
A
what
B
whether
C
how
D
why
Thinking________you know _________in fact you don’t is a terrible mistake.
#30395
A
what, what
B
that, what
C
what, that
D
that, that
(2013·江西南昌一模)It hasn't been made clear ________ the new underground line is to be open to traffic.
#30422
A
when
B
that
C
what
D
where