Most birds find it safe to sleep in the trees,but_______they have eggs or young chicks,they don’t use a nest.
#71783
A
why
B
how
C
unless
D
where
推荐题目
As you wander through the streets, you see thousands of masks but you have no idea_____ the faces behind them look like.
#67631
A
which
B
what
C
that
D
how
______ come into leaf or bloom is obviously a sign of spring.
#69125
A
Trees
B
The trees
C
That trees
D
What trees
The growing speed of a plant is influenced by a number of factors，________ are beyond our control.
#66759
A
most of them
B
most of which
C
most of what
D
most of that