his father has been away for more than one year, John can still keep doing what he needs to.
#67708
A
While
B
When
C
As
D
Whether
推荐题目
The genetic engineering, ______ progress has been very rapid recently, is perhaps the most important of all the sciences．
#69473
A
to which
B
with which
C
in which
D
for
John thinks it won’t be long ________ he is ready for his new job.
#67871
A
when
B
after
C
before
D
since
----_____is it that is troubling Mary ?----Working out the maths problem..
#70665
A
What
B
How
C
Why
D
Which