Anne couldn't concentrate ________ what she was doing while her family were watching TV．

A．to

B．on

C．for

D．in

If you don't ________ more on your work, you will be fired soon．

A．concentrate

B．fix

C．pay

D．cost

Since the computer price has ________, why not buy one, Madam Kin?

A．brought down

B．put down

C．gone down

D．taken down

Now we can watch various live TV programmes ________ the communication satellites．

A．on

B．in

C．from

D．via

－Dr．White has got plenty of information about UFO．He's promised to offer it to me．

－I have as much．Would you like to have mine ________?

A．as well

B．as possible

C．so far

D．if so

This machine is ________ hundreds of different parts．

A．made of

B．made from

C．made up of

D．consisted of

It's a simple dish to prepare, mainly ________ rice and vegetables．

A．consisting of

B．made up for

C．made from

D．consisting in

The Internet is of great value as a data ________．

A．resource

B．source

C．wealth

D．basis

We seldom hesitate ________ whether to stay in Paris．

A．with

B．to

C．about

D．on

Whenever you are in trouble, don't hesitate ________ me for help．

A．asking

B．to ask

C．in asking

D．to asking