新概念英語(yǔ)第四冊(cè)課后習(xí)題及答案第17課

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新概念英語(yǔ)第4冊(cè)課后習(xí)題答案:
    Unit 17 BBADA BBDCD CA
    新概念英語(yǔ)第4冊(cè)課后習(xí)題:
    Multiple choice questions 多項(xiàng)選擇題
    Choose the correct answers to the following questions.
    Comprehension 理解
    1 One of the reasons rabbits multiplied so rapidly in Australia is that they ______.
    a.were unwisely introduced by enterprising settlers
    b.breed rapidly
    c.overran the continent
    d.overcame their natural enemies in the Antipodes
    2 Scientists found ______ of spreading myxomatosis.
    a.one way
    b.two ways
    c.three ways
    d.a large number of ways
    3 The disease was spread right across the continent of Australia largely because ______.
    a.of the mosquito
    b.of the rabbit
    c.scientists let infected animals loose in burrows
    d.Australia encouraged diseased rabbits to migrate to other places
    4 Myxomatosis, that was a blessing in Australia, proved to be ______in Europe.
    a.domesticated
    b.a disease
    c.profitable
    d.a curse
    Structure 句型
    5 This rabbit had no natural enemies in theAntipodes ______.(1.2)
    a.and as a result it multiplied
    b.in order to multiply
    c.so that it might multiply
    d.because it multiplied
    6 It______ and caused devastation.(1.3)
    a.burrowing
    b.burrowed
    c.was burrowing
    d.has burrowed
    7 ______ were local epidemics created? By infecting animals.(1.6)
    a.Why
    b.How
    c.Where
    d.When
    8 It was ______ to create local epidemics of this disease.(11.6-7)
    a.potent
    b.able
    c.enabled
    d.possible
    Vocabulary 詞匯
    9 It caused devastation by ______ the herbage.(11.3-4)
    a.burrowing into
    b.infecting
    c.consuming
    d.digging
    10 By infecting animals and ______them loose in burrows ...(1.6)
    a.allowing
    b.leaving
    c.introducing
    d.turning
    11 The rabbits were able to ______this disease to a certain extent.(1.10)
    a.react to
    b.prevent
    c.withstand
    d.oppose
    12 Australia ______the rabbit as a pest from Europe.(1.13)
    a.inherited
    b.obtained
    c.assumed
    d.claimed