The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.
#74309
A
what
B
which
C
that
D
though
推荐题目
________ is known to us a11 is that the Diaoyu islands have been part of our Chinese territory since ancient times.
#68215
A
As
B
Which
C
It
D
What
I have two grammars, ______are of great use.
#73806
A
all of which
B
either of which
C
both of that
D
both of which
I’ve already told you that I’m going to buy it, ________．
#67719
A
how much does it cost
B
no matter how it costs
C
however does it cost much
D
however much it costs
The engineer ______my father works is about 50 years old.
#73792
A
to whom
B
on whom
C
with which
D
with whom