________ a child, he was left an orphan and had to make a living by himself.

[　　]

The food and water will ________ three days.

[　　]

The construction of Shanghai Subway No. 2 ________ the convenience of the traffic in the city.

[　　]

He spent the ________ of his winter vacation traveling abroad.

[　　]

The naughty boy tried to avoid ______.

[　　]

A．to be punished　　　B．punishing

C．being punished　　　D．to punish

It ______ be Mary who is playing the piano. She hurt her finger badly just a moment ago. 

[　　]

A．must　　　B．shouldn't　　　C．can't　　　D．may

I'm not sure which room ______ tonight.

[　　]

A．to sleep on　　　B．sleep in

C．to sleep in　　　D．I slept in

Computer has made a great ______ on people’s daily life.

[　　]

A．effect　　　B．affect

C．impact　　　D．affecting

______ knowledge is a dangerous thing.

[　　]

A．A little　　　B．Little　　　C．Few　　　D．A few

The radio is ______ loud. Please turn ______.

[　　]

A．much too...it down

B．too much...it down

C．much too...it off

D．too much...it up