Paper produced every year is ________ the world's production of vehicles．

A．the three times weight of

B．three times the weight of

C．as three times heavy as

D．three times as heavier as

The research is so designed that once ________ nothing can be done to stop it．

A．begins

B．having begun

C．beginning

D．begun

It was with great joy ________ he received the news that his lost daughter had been found．

A．because

B．which

C．since

D．that

－Excuse me, I want to have my watch fixed, but I can't find a repair shop．

－I know ________ nearby．Come on, I'll show you．

A．one

B．it

C．some

D．that

You can take anything from the shelf and read, but please ________ the books when you've finished with them．

A．put on

B．put down

C．put back

D．put off

It is reported that the United States uses ________ energy as the whole of Europe．

A．as twice

B．twice much

C．twice much as

D．twice as much

The house rent is expensive, I've got about half the space I had at home and I am paying ________ here．

A．as three times much

B．as much three times

C．much as three times

D．three times as much

Americans eat ________ vegetables per person today as they did in 1910．

A．more than twice

B．as twice as many

C．twice as many as

D．more than twice as many

－I'm going to the post office．

－________ you're there, can you get me some stamps?

A．As

B．While

C．Because

D．If

She thought I was talking about her daughter, ________ in fact, I was talking about my daughter．

A．whom

B．where

C．which

D．while