If the sun has enough __26___ to warm and light the whole earth, it must have enough power to do other things, __27____. Can we use the sun’s __28____ energy to supply electricity or other types of power usually perform? The answer is __29_____.
For example, people have for many years been using the __30___ heat of the sun to cook by solar __31___ which have been built with several incurved __32___ reflecting the sun and focusing the heat on the cooking element. This __33____ can be used like a gas or electric stove; it is more expensive to make but it doesn’t need any __34__ and so costs __35___ to use. Another _36__ of using solar energy is in house heating.
The _37____ of energy we use most is electricity, and every day more is _38____. But electricity has to be made too, and to make it huge quantities of fuel is required---oil, coal, gas and nowadays even uranium.
The question which __39___ everyone today is; how long will these fuels _40__? Nobody knows it for sure, __41___ most experts think it will soon be difficult to obtain sufficient electricity from these sources. It is possible that the sun can make a(n) __42____ here, too.
Solar power has already been used to produce _43__ heat. In Southern France a solar furnace has been built, _44___ temperatures reach more than 3,000 centigrade. This furnace is not only used for experiment __45___, but could be used to produce steam for a power station.
26.
A. power
B. time
C. heat
D. temperature
27.
A. as well
B. too
C. besides
D. either
28.
A. little
B. rich
C. small
D. useless
29.
A. negative
B. unknown
C. no
D. yes
30.
A. heated
B. shining
C. producing
D. reflected
31.
A. cooks
B. cookers
C. bath
D. persons
32.
A. mirrors
B. plates
C. roofs
D. walls
33.
A. bathroom
B. machine
C. object
D. equipment
34.
A. money
B. fuel
C. material
D. person
35.
A. most
B. much
C. every
D. nothing
36.
A. possibility
B. danger
C. success
D. chance
37.
A. way
B. sort
C. kind
D. form
38.
A. worth
B. brought
C. needed
D. expensive
39.
A. worry
B. worries
C. worried
D. is worried
40.
A. stop
B. produce
C. work
D. last
41.
A. and
B. so
C. but
D. though
42.
A. contribution
B. heat
C. light
D. energy
43.
A. small
B. tiny
C. terrific
D. little
44.
A. which
B. where
C. when
D. it
45.
A. in the future
B. for ever
C. in the past
D. at present
26.A 27 B 28 B 29 D 30 D
31 B 32 A 33 D 34 B 35 D
36 A 37 D 38 C 39 B 40 D
41 C 42 A 43 C 44 B 45 D
