The policy of the mainland is very clear and straightforward，and the key problem is_____the leaders of Taiwan will accept it.
#30628
A
that
B
how
C
why
D
whether
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Life is filled with things we have no control over, ________ ourselves, we can control.
#30543
A
for
B
and
C
so
D
but
She has a gift for creating an atmosphere for her students ____allows them to communicate freely with each other.
#32936
A
which
B
where
C
what
D
who
________ there are living creatures in the outer space as those on Earth hasn't been proved until now.
#30306
A
How
B
When
C
Where
D
Whether