He met many problems he was going over his lessons.
#41397
A
before
B
as soon as
C
since
D
while
推荐题目
After quarreling with her best friends, Mary has got herself into a situation______ she is likely to turn to nobody for help.
#70640
A
where
B
which
C
while
D
why
The announcement ______all flight were cancelled because of bad weather greatly distressed the waiting passengers.
#70274
A
that
B
which
C
why
D
of which
I like to go shopping at the weekdays,_____the shop isn’t crowded.
#73718
A
which
B
when
C
that
D
where
Taobao.com is a free site, _________ visitors can not just purchase almost all kinds of products but open their own online shops.
#72026
A
where
B
which
C
what
D
whose