B.is being polluted C.has been polluted
D.have been polluted 解析:选D。本题考查时态、语态及主谓一致问题。句意:——这湖水怎么这么难闻?——因为大量的水已经被污染了。water与pollute为被动关系,故排除A项;B项表示“正被污染”,故排除;large quantities of后加名词,谓语动词应与quantities保持一致,故排除C项,答案为D项。 3.(2010·高考江西卷)Last year the number of students who graduated with a driving licence reached 200,000,a(n)__________ of 40,000 per year. A.average
B.number C.amount
D.quantity 解析:选A。an average of...平均是……。句意为:去年毕业就有驾照的学生人数达到20万,平均每年4万。 4.Father is strongly opposed __________ shopping on Sunday because the streets and supermarkets are full of people. A.to do
B.to doing C.of doing
D.with doing 解析:选B。考查be opposed to (doing) sth.短语。be opposed to (doing) sth.“反对……”,其中to为介词,后跟名词或动名词。 5.(2011·高考天津卷)He was a good student and scored __________ average in most subjects. A.below
B.of C.on
D.above 解析:选D。句意为:他是个好学生,而且大部分课程的成绩高于平均分。本题考查介词辨析。above average高于平均水平;below average低于平均水平;on average按平均计算。根据a good student可知D项正确。 短语精释 1come about 发生;造成 (教材P26)So how has this come about and does it matter? 那么,这种温度的升高是怎么产生的呢?会有什么影响呢? Unit 4 Global warming ——全球变暖 基础盘点自测自评 核心单词
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