The companies are working together to create _____they hope will be the best means of transport in the 21st century.
#72930
A
which
B
that
C
what
D
Who
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