My parents were quarrelling about me ____ I could not quite tell why．
#79999
A
since
B
though
C
if
D
until
推荐题目
________ 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
___ I saw her, she was working in a shop.
#30196
A
The last time
B
For the last time.
C
To the last time.
D
In the last time.
On his way home yesterday , Tom was hit on the head_____he had time to realize what was happening .
#34827
A
since
B
before
C
when
D
until
Ellen was a painter of birds and of nature，________，for some reason，had withdrawn from all human society.(2012·浙江，17)
#30487
A
which
B
who
C
where
D
whom