新概念英语第四册课后答案详解:新概念英语第四册课后习题及答案第17课

新概念英语第4册课后习题答案:

　　Unit 17 BBADA BBDCD CA

　　新概念英语第4册课后习题:

　　Multiple choice questions 多项选择题

　　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 词汇

　　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

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