题目内容：
All the useful energy at the surface of the earth comes from the activity of the sun. The sun heats and feeds mankind. Each year it 1 men with two hundred million tons of grain and 2 ten million tons of wood.Coal，oil，natural gas，and all other 3 are stored-up energy from the sun. It was collected by the plants as carbon compounds and stored 4 ago.
Even waterpower comes from the sun. Water 5 into vapor by the sun falls as rain. It runs 6 the mountains and is converted to electric power.
Light transmits only the energy 7 comes from the sun’s outer layers，and 8 of this energy that is directed toward the earth never arrives. About 9 of it is absorbed by the atmosphere of the earth. In 10 ，the earth itself gets only one half-billionth of the sun’s entire output of radiant energy.
(1) A 、 gathers B 、 produces C 、 provides D 、 sends
(2) A 、 hardly B 、 merely C 、 really D 、 nearly
(3) A 、 fuels B 、 solids C 、 soils D 、 materials
(4) A 、 years B 、 ages C 、 times D 、 generations
(5) A 、 turns d B 、 turning C 、 turned D 、 is turned
(6) A 、 up B 、 down C 、 around D 、 into
(7) A 、 that B 、 what C 、 where D 、 because
(8) A 、 little B 、 a little C 、 much D 、 few
(9) A 、 nine-ten B 、 ninth-ten C 、 nine-tenth D 、 nine-tenths
(10) A 、 place B 、 fact C 、 form D 、 part
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