He met many problems------ he was going over his lessons.
#57608
A
before
B
as soon as
C
since
D
while
推荐题目
—How do you like the popular documentary “A Bite of China”（《舌尖上的中国》）?—Excellent! You won’t realize how wonderful our Chinese food is _____ you watch it.
#55212
A
when
B
as
C
after
D
until
This problem is ______ difficult __________.
#57835
A
so; that few of us can do
B
so; that few of us can do it
C
too; for anyone of us to do
D
too; for anyone of us to do it