He met many problems------ he was going over his lessons.

He met many problems------ he was going over his lessons.

#57608

before

as soon as

since

while

推荐题目

Last Sunday I went shopping with my mother ________ bought nothing.

#58480

and

but

They are _______ little sheep that we can’t make much money by selling _______.

#56435

so, it

such, it

so, them

such; them

 –What was your brother doing at this time yesterday?-- He was reading a magazine ________ I was writing an e-mail at home.

#55135

as soon as

after

until

while

We should protect the earth，         we will have no water to drink．

#58271

and

but

–What is your sister going to be ________ she grows up?–She is going to be an engineer.

#56613

before

although

when

unless

共1556题