新概念英语第三册第42课笔记|新概念英语第三册第42课习题答案及解析

新概念3课后习题答案：Lesson 42 1d 2a 3b 4c 5c 6b 7d 8b 9c 10a 11d 12b
　　声。
　　Multiple choice questions多项选择题
　　Choose the correct answers to the following questions.
　　Comprehension 理解
　　1 In undertaking the descent of a really deep cave, a pot-holer ______ .
　　a.must be motivated by the desire to make an unexpected discovery
　　b.is prepared to spend a whole weekend away from his home
　　c.needs military co-operation in making preparations for the descent
　　d.may have to spend as much as a week planning his descent
　　2 The cave discovered by the French potholer, Berger ______ .
　　a.represents the ultimate challenge to any pot-holer who is truly dedicated
　　b.was recently explored for the first time since its discovery
　　c.has to be approached by following a stream which leads underground
　　d.consists of a large cavern, the size of a huge concert hall
　　3 On reaching the enormous cavern, the pot-holers ______ .
　　a.had to squeeze into a cleft in the rocks at the side
　　b.lit it up by using the arc lights they had carried down with them
　　c.saw a rainbow shedding its light on the limestone around them
　　d.could still hear the waterspout falling into the pool behind them
　　Structure结构
　　4 ---- or the chance that they ______ anunexpected discovery that…(11. 2-3)
　　a.would make
　　b.can make
　　c.may make
　　d.might have made
　　5 It can take as long as eight days getting ropeladders rigged up and ______ before …(11. 9-10)
　　a.to establish bases supplied
　　b.supplying bases established
　　c.establishing supply bases
　　d.bases established and supplied
　　6 After ______ the narrow gap, they climbed down the steep sides of the cave. (11. 18-19)
　　a.they were entering
　　b.entering
　　c.entered
　　d.they will enter
　　7 ---- let ______ the current to the other side . (11. 22-23)
　　a.them be carried with
　　b.their being carried by
　　c.themselves carry
　　d.themselves be carried by
　　8 No other sound could be heard ______ made by water…(11. 30-31)
　　a.except it was
　　b.than that
　　c.that was
　　d.but this was
　　Vocabulary词汇
　　9 It can take ______ eight days to rig up… (1. 9)
　　a.around
　　b.more than
　　c.up to
　　d.at least
　　10 ---- has tunnelled a course through a ______ in the rocks. (11. 13-14)
　　a.fault
　　b.gap
　　c.cleft
　　d.fissure
　　11 They had to ______ along this …(11. 19-20)
　　a.sidle nervously
　　b.file sideways
　　c.walk sharply
　　d.move cauriously
　　12 To protect themselves from the ______ water, they wore special rubber suits. (1. 23)
　　a.frozen
　　b.freezing
　　c.chilly
　　d.iced

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