When deeply absorbed in work, _____ he often was, he would forget all about eating or sleeping.
#78649
A
that
B
which
C
where
D
when
推荐题目
I have bought two ball pens, _____ writes well.
#78692
A
none of them
B
neither of them
C
none of which
D
neither of which
A huge amount of oil was spilt on the East Sea, the causes of ______ are still under investigation.
#78658
A
it
B
that
C
which
D
whom
The worsening of global warming, _____human activities are to blame, has led to frequently extreme weather.
#78724
A
by which
B
for which
C
that
D
what
I’m sorry not to have replied to your letter earlier, ______, I must say , I apologize.
#78689
A
which
B
for which
C
to which
D
whom