I have kept the photo________ I can always see it, as it reminds me of the days when I studied in Britain．

A．at which

B．when

C．where

D．at the place

Every one of us must know： ________we live can we save the earth．

A．by changing the way only

B．only by changing the way

C．by only changing the way

D．by changing only the way

What shall we use for power when all the oil in the world has________?

A．given out

B．put out

C．help up

D．used up

Never before________ in greater need of modern public transport that it is today．

A．has this city been

B．this city has been

C．was this city

D．this city was

The storm left, ________a lot of damage to this area．

A．caused

B．to have caused

C．to cause

D．having caused

About 60 percent of the students ________ from the south, the rest of them ________ from the north and foreign countries．

A．are; is

B．are; are

C．is; are

D．is; is

Please tell me the way you thought of ________ the garden．

A．take care of

B．to take care of

C．taking care of

D．how to take care of

Hi, please support him．I’m afraid he must have________ at the party．

A．get drunk

B．got drunk

C．get drinking

D．get to drink

My foreign teacher has ________our leader’s．

A．as a big house as

B．as big a house as

C．the same big house as

D．a house the same big as

Someone called me up in the middle of the night, but they hung up ________ I could answer the phone．

A．as

B．since

C．until

D．before