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
I lost a book, ______I can't remember now. 
#73837
A
whose title
B
its title
C
the title of it
D
the title of that
 ______ the day went on the weather get worse.
#71945
A
With
B
Since
C
What
D
As
 ______ the poem a second time, the meaning will become clearer to you.
#71969
A
You having read
B
While reading
C
When you read
D
If reading
The man pulled out a gold watch,_____were made of small diamonds.
#74474
A
the hands of whom
B
whom the hands of
C
which the hands of
D
the hands of which