[单项选择]So far no one has been able to account for the cause of the accident.
A. assess
B. explain
C. describe
D. investigate

[单项选择]So far no one has been able to account for the cause of the accident.
A. assess
B. explain
C. describe
D. investigate

[单项选择]

Passage 4
Sally Kemmerer has, so far, escaped Northern California’s rolling blackouts.
But up on the roof for her Oakland home, workers are tapping into, perhaps, the most reliable power source, the sun. It could mean no more worries about blackouts or power rates.
Sally Kemmerer, homeowner says, "I hope that we’ll be able to zero out, you know, our electric bill. I mean that’s definitely our goal."
Turning the sun’s rays into electricity is, of course, nothing new.
But California’s power crisis has cast a new light on the technology.
Gary Gerber, a solar power contractor, says, "I might have been getting, say three phone calls a week a couple of months age. I’m getting six a day now, it’s completely crazy."
Alternative energy is even more attractive, thanks to a state rebate program. So far this month, California’s energy commission has received 200
A. to lose a special item or treasure
B. to gain solar power
C. to pay for more reliable electrical power
D. to owe the electric utility company nothing

[单项选择]Our research has not shown us anything so far, so there is little ______ to continue with it.
A. impatience
B. incentive
C. impulse
D. initiative

[单项选择]Since our research so far has not produced any answers to this problem, we need adopt a different ______ to it.
A. approach
B. way
C. means
D. method

[单项选择]The young professor has so far published mote than 20 academic paper’s，many of which are intemational standard．


A. 这位年轻的教授已远远发表了20份国际标准的校园刊物。
B. 这位年轻的教授到目前为止已发表了20多篇学术论文，其中许多具有国际标准。
C. 这位年轻的教授已远远发表了20多篇学术论文，其中许多具有国际标准。
D. 这位年轻的教授到目前为止已发表了20多篇学术论文，其中许多具有国际水平。

[单项选择]A) So far C) So few
B) By far D) So much


A. So far
B. By far
C. So few
D. So much

[单项选择]No one has ______ been able to know who she is.
A. still
B. yet
C. already
D. just

[单项选择]Jane has said little so far, responding only briefly when______.
A. spoken
B. speaking to
C. speaking
D. spoken to

[单项选择]How much has Shell invested in China so far


A. 1.6 billion USD.
B. 1.6 million USD.
C. 5 billion US
D. D. 5 million US

[单项选择]Progress so far has been very good. ______ , we are sure that the project will he completed on time.


A. However
B. Otherwise
C. Therefore
D. Besides