新概念英语第四册第18课逐句精讲|新概念英语第四册第18课练习题及答案

新概念英语第4册课后习题答案:
　　Unit 18 BABCD CDCCC BA
　　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 The writer of this piece probably ______.
　　a.doubts whether porpoises have a special relationship with humans
　　b.believes that porpoises have a special interest in humans
　　c.thinks that porpoises can't tell the difference between a human and a mattress
　　d.thinks that porpoises are attracted by humans as a possible meal
　　2 The stories we hear about porpoises suggest that porpoises ______.
　　a.take a special interest in us
　　b.are as intelligent as we are
　　c.always save humans who are drowning
　　d.always protect humans from sharks
　　3 Porpoises often give turtles a bad time because ______.
　　a.they are natural enemies
　　b.they like to play
　　c.turtles enjoy being badly treated
　　d.they often share an oceanarium
　　4 One of these statements is true.Which one?
　　a.Porpoises try to kill turtles by lifting their shells.
　　b.Porpoises never allow turtles to stand up.
　　c.Turtles seem to take part in this game played by porpoises.
　　d.Turtles don't feel any pain when they're ill-treated by porpoises.
　　Structure 句型
　　5 The superstition among mariners ______.(1.1)
　　a.was very common
　　b.has been very long
　　c.existed long ago
　　d.has lasted a long time
　　6 ______ intelligent they may be, it is a mistake to...(1.3)
　　a.Regardless that
　　b.Whatever
　　c.No matter how
　　d.Whether
　　7 Whether it ______bird, fish or beast, the porpoise is intrigued ...(1.10)
　　a.were
　　b.has been
　　c.was
　　d.is
　　8 Hardly has the turtle recovered his equilibrium ______he is knocked down.(11.16-17)
　　a.but
　　b.though
　　c.when
　　d.than
　　Vocabulary 词汇
　　9 The of a possible meal attracted sharks.(1.8)
　　a.odour
　　b.perfume
　　c.smell
　　d.aroma
　　10 The porpoise is ______with anything that is alive.(1.10)
　　a.repelled
　　b.attracted
　　c.fascinated
　　d.puzzled
　　11 One young calf especially enjoyed ______a turtle to the surface.(11.11-12)
　　a.rising
　　b.lifting
　　c.arousing
　　d.elevating
　　12 The first porpoise ______down from above.(1.15)
　　a.dives
　　b.flies
　　c.jumps
　　d.falls

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