It is OK to leave an electrical appliance on so long as you are
using it(只要你在用它)—if not, turn it off!
5. it作形式主语,代指不定式的用法 It takes a lot of energy to make things from new materials (将新材料制成物品), so, if you can, buy things made from recycled materials.
【解析】选 B。句意:全球变暖的原因是人类行为所致而不 是一种随意的自然现象。 rather than 而不是; other than 除
了;more than不仅仅,多于;less than少于。
2. All scientists _____ the view that the increase in the earth’s temperature is due to the burning of fossil fuels like coal, natural gas and oil to produce energy. A. contribute to C. object to B. lead to D. subscribe to
Ⅳ. 教材设题 1. It is human activity that has caused this global warming _____ a random but natural phenomenon. A. other than B. rather than
C. more than
D. less than
driving licence reached 200, 000, a(n)______ of 40, 000 per