完型填空
(三)
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 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-tenth C: nine-tenth D: nine-tenths
10: A: place B: fact C: form D: part
1-5:CDABC
6-10:BACDB
