Most birds find it safe to sleep in the trees, but ____ they have eggs or young chicks, they don’t use a nest.
#79977
A
why
B
how
C
unless
D
where
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The days are gone ________ physical strength was all you needed to make a living.(2011·天津，10)
#30486
A
when
B
that
C
where
D
which
Care of the soul is a gradual process ________ even the small details of life should be considered.(2012·湖南)
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A
what
B
in what
C
which
D
in which
Next month we’ll move to a new building, next to _______ a nice restaurants where we can have Chinese food.
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A
which are
B
it is
C
which is
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Mary felt sad over the loss of photos she had shot in Australia, ______ that was a memory she especially treasured.
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A
as
B
which
C
when
D
where