The days are gone________you can breathe fresh，unpolluted air or drink clean, unpolluted water in the countryside.
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A
when
B
that
C
where
D
which
推荐题目
This is the only one of the students _____ the truth.
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A
that knows
B
that know
C
who know
D
which knows
Taobo is Asia's largest retail（零售的） network platform, ______ people can buy and sell many kinds of things．
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A
where
B
when
C
that
D
whose
In Canada, cross country skiing is a popular sport among people ______ they can enjoy excitement and adventure.
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A
that
B
where
C
whom
D
which
I will never forget the day _____ we worked together in London．
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A
when
B
on that
C
which
D
while
We meet on the last Friday of every month to talk about poems and poets ______ we like.
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A
when
B
where
C
that
D
which