Nowadays，it is common to see people staring at their mobile phones instead of reading a real book，＿＿＿＿＿＿many experts are worried．
#75642
A
when
B
for which
C
where
D
about which
推荐题目
The manager seemed to be doubtful about my ability, _______ I could see from the expression on his face.
#76305
A
this
B
where
C
that
D
which
The visiting professor gave us some advice,________ of great help to our English learning.
#75205
A
I think it is
B
I think which is
C
which I think is
D
which I think it is
--- I want to know whether the day I am looking forward to will come today or tomorrow.--- Does that make any difference?
#75505
A
when
B
why
C
that
D
on which