Forests ________ and burned at such a speed that they will disappear from the earth in the future．

A．cut

B．are cut

C．are being cut

D．had been cut

The skirt ________ she spent 50 yuan is very beautiful on her．

A．in which

B．on which

C．for which

D．with which

That was the first time ________ I ________ face to face with the president．

A．when; had come

B．that; have come

C．when; came

D．that; had come

How did all these ________?

A．came out

B．come up

C．come across

D．come about

Excuse me, but can you tell me ________?

A．where can I get to the library

B．where I can get to the library

C．how can I get to the library

D．how I can get to the library

He hesitated for a little while before kicking the ball．Otherwise, he ________ a goal．

A．had scored

B．would have scored

C．scored

D．would score

________ in the regulations that you should not tell other people the password of your e-mail account．

A．What is required

B．what requires

C．It is required

D．As is required

Every day the boy, together with his classmates, ________ to go to the playground and ________ football, ________ themselves．

A．are noticed; play; enjoying

B．is noticed; plays; enjoying

C．are noticed; plays; enjoys

D．is noticed; play; enjoying

Many people believe we are heading for environmental disaster ________ we basically change the way we live．

A．but

B．although

C．unless

D．if