新概念英語第三冊第42課習(xí)題答案及解析

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新概念3課后習(xí)題答案:Lesson 42 1d 2a 3b 4c 5c 6b 7d 8b 9c 10a 11d 12b
    聲。
    Multiple choice questions多項選擇題
    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結(jié)構(gòu)
    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詞匯
    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