________ in faraway northwest, this place has its beautiful fresh air.

[　　]

A．Being located　　　　　　B．Located

C．Locating　　　　　　　　D．Having located

________ today, she would arrive in New York by Tuesday.

[　　]

A．If she leaves

B．Were she to leave

C．Was she leaving

D．Would she have left

________, we get the itch for adventure.

[　　]

A．Every now and then

B．Again and again

C．Now and again

D．Both A and B

His white look on his face suggested that he ________ seriously ill for a long time.

[　　]

A．should have been　　　　　B．must have been

C．be　　　　　　　　　　　D．was

Without electricity, people made some candles ________ light.

[　　]

A．giving　　　　　　B．give

C．to give　　　　　　D．given

The chair looks rather hard, but in fact, it is very comfortable to ________.

[　　]

A．sit　　　　　　 B．sit on

C．be sat　　　　　D．be sat on

________ their service, the workers of the hotel are active in learning English.

[　　]

A．Improving　　　　　　B．To improve

C．Improve　　　　　　　D．Having improved

Prices of daily good ________ through a computer can be lower than store prices.

[　　]

A．are bought　　　　　　B．bought

C．been bought　　　　　D．buying

________ to sunlight for too much time will do harm to one's skin.

[　　]

A．Exposed

B．Having exposed

C．Being exposed

D．After being exposed

A new law ________ to prevent the factories from sending out waste water into rivers.

[　　]

A．has been past　　　　　　　B．has passed

C．has been passed　　　　　　D．has past