[单项选择]______ energy which the sun radiates goes in every direction, and only ______ minute part of it falls on the earth.
A. The, a
B. /, a
C. /, the
D. The, /

[单项选择]

Passage 5
The energy which the sun radiates goes in every direction, and only a minute part of it falls on the earth. Even so, it represents power of about 5,000,000 horsepower (马力)per square mile per day; the sun gives us as much energy every minute as mankind utilizes in a year. At present, we use this energy in directly, and it is our final source of power. Coal represents the chemical action of the sun on green plants thousands of years ago. Water power results from the rain formed by vapor which comes from the evaporation of power. Coal represents the rain formed by vapor which comes from the evaporation of water under the sunshine. Even windmills operate because of air currents set in motion by the different heating affects of the sun in different places. Some day, through chemistry or some type of solar engine, we shall harness this great source of energy more directly. Already a scientist has worked out an engine, surprisingly efficient, in with the sun&rsq
A. a machine using solar energy efficiently has already been developed
B. the sun is our final source of power
C. man uses only a tiny part of the sun's energy
D. the part of the sun's energy we use is used indirectly

[单项选择]

Iceland has the oldest parliament, which goes as far back to 930 A.D. when Althing, the legislative organization , was established.（）

A. office
B. adobe
C. assembly
D. building

[单项选择]There is an old saying in English which goes, "Never put off until tomorrow What you can do today."
A. look for it
B. put it in place
C. cancel it
D. postpone it

[单项选择]There is an old saying which goes, "Never ______ until tomorrow what you can do today."
A. put aside
B. put up
C. put off
D. put away

[单项选择]There is an old saying which goes, "Never ______ Until tomorrow what you can do today."
A. put aside
B. put up
C. put off
D. put away

[单项选择]Pluto goes around the sun once in 248 years, if we ______ the earth's year ______. a standard.
A. take; as
B. take; for
C. take; in
D. take up; for

[单项选择]Jessica goes to the clinic every other day to have heat _________ for her sore shoulders.


A. prescription
B. inspection
C. alleviation
D. therapy