By the end of last month, I ________ all the CDs of Justin Bieber．

A．collect

B．collected

C．have collected

D．had collected

You ________ lose your way if you walk alone in the mountains at night．

A．may

B．need

C．should

D．ought to

We didn’t start our discussion ________ everybody arrived．

A．since

B．if

C．while

D．until

Take the exam carefully, ________ you won’t get full marks．

A．but

B．and

C．or

D．so

We hope that with the help of the new skill, Liu Xiang can run ________ than before．

A．fast

B．faster

C．fastest

D．the fastest

The students from Xinjiang enjoy staying in our school because everyone is ________ to them．

A．friendly

B．gently

C．happily

D．politely

The old man used to raise many ________ to make a living on the farm．

A．duck

B．horse

C．bird

D．sheep

I have two children, and ________ of them are working in the west of China．

A．all

B．both

C．neither

D．either

The university student borrowed some money ________ his friends to start his own business．

A．from

B．onto

C．at

D．in

This novel can make you laugh and cry at ________ same time．

A．a

B．an

C．the

D．/