Cheer up! Everyone may have periods in their lives everything seems tough．
#78039
A
which
B
where
C
when
D
that
推荐题目
Our neighbor offered to look after our baby yesterday when we were busy, _____is often the case.
#75738
A
it
B
that
C
which
D
as
In the cafeteria, I saw my sister and her three friends, none of ____ I had ever seen before.
#76784
A
them
B
which
C
whom
D
those