According to the passage, the Southern California oil fields were initially exploited due to ___________ .
A.the fuel requirements of Los Angeles' rail system
B.an increase in the use of gasoline engines in North America
C.a desire to put unproductive desert land to good use
D.innovative planning on the part of the city founders

It can be inferred from the passage that the spatial organization of Los Angeles contributed to the relative decline there of ____________ .
A.public transportation
B.industrial areas
C.suburban neighborhoods
D.oil fields

_____ for the fact that he was working abroad, he would willingly have helped with the project.
A.If it had been
B.If it hadn't been
C.Hadn't it been
D.Had it been

"Do you think Harry will want something to eat after he gets here?"- "I hope not. It 'll probably be after midnight, and we _____."
A.are sleeping
B.have been sleeping
C.will be sleeping
D.be sleeping

"Could you lend me your pencil?" - "_____ "
A.Yes, I have just got one.
B.Sorry, I haven't got one.
C.No, I couldn't. Excuse me.
D.And could you take care of it ?

In _____ , I must acknowledge that we were guilty of errors of judgement.
A.response
B.review
C.experience
D.retrospect

I could't help _____ what you said. You were saying so loudly.
A.overhear
B.to overhear
C.overhearing
D.overheard

The cats, four _____ were removed from the animal shelter, received tetanus shots.
A.of whom
B.of them
C.of which
D.among them

Her hair was wet from the _____ tossed up by the huge waves.
A.foam
B.lather
C.surf
D.spray

Giving up smoking is just one of the ways to _____ heart disease.
A.turn off
B.put off
C.ward off
D.switch off