－Can you work out this math problem?

－Yes, I can．It’s ________．

A．hard

B．difficult

C．simple

D．easier

If you want to open a file, please ________ on the icon．

A．left twice clicks

B．left double clicks

C．double left click

D．twice left clicks

I want to watch the news on TV．________, please．

A．Turn on it

B．Turn it on

C．Turn off it

D．Turn it off

The book was written ________ Lu Xun．

A．by

B．with

C．as

D．/

Try to buy one before all the tickets ________．

A．will be sold

B．will be sold out

C．are sold

D．are sold out

The news ________, right?

A．sound exciting

B．sounds exciting

C．sounds excited

D．sounds excitingly

Chinese ________ by the largest number of people in the world now．

A．is spoken

B．is speaking

C．speaks

D．spoke

Metal ________ making machines and many other things．

A．used to

B．is used for

C．is used as

D．is used to

My father will be back from Beijing ________ a week．

A．for

B．in

C．after

D．behind

Tom is ________ boy now．

A．a 11-years-old

B．a 11-year-old

C．an 11-year-old

D．an 11-years-old