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23课

新概念英语第4册课后习题答案:

　　Unit 23 CADCC DCABC AC

　　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 two classes of flight depend on ______.

　　a.occasional movement and progress

　　b.wing span and gliding

　　c.gliding and muscle-power

　　d.wind currents and machinery

　　2 The albatross can keep flying for very long periods because it ______.

　　a.actively uses air movement to stay in the sky

　　b.it is a very great bird

　　c.recognizes ships at sea

　　d.it can glide in any direction, regardless of air currents

　　3 Ducks can fly in any direction ______.

　　a.and stay in the air indefinitely

　　b.but are too heavy to fly for long

　　c.and uses engine power

　　d.but can run out of energy

　　4 The swallow ______.

　　a.is often greeted by superstitious villagers

　　b.is good for people

　　c.combines both forms of flight

　　d.is an omen of good luck

　　Structure 句型

　　5 The albatross ______to yield to the opposition ofthe wind.(1.6)

　　a.must

　　b.could

　　c.has

　　d.should

　　6 The duck comes nearer to the engines ______manhas‘conquered’the air with.(11.7-8)

　　a.where

　　b.who

　　c.whom

　　d.-

　　7 Partridges ______a like power of strong propulsion.(1.11)

　　a.contain

　　b.provide

　　c.possess

　　d.display

　　8 It ______, not does it boast of its power.(1.13)

　　a.does not tire

　　b.not tire

　　c.not tires

　　d.do not tire

　　Vocabulary 词汇

　　9 There is no ______to the variety of flight practised by birds.(1.1)

　　a.opportunity

　　b.end

　　c.point

　　d.goal

　　10 The great bird has______ wings.(1.5)

　　a.broad

　　b.long

　　c.huge

　　d.wide

　　11 Duck, like pigeons, are ______with steel-like muscles.(1.8)

　　a.provided

　　b.gifted

　　c.talented

　　d.inherited

　　12 We no longer look for ______in the way they fly.(11.15-16)

　　a.guides

　　b.notices

　　c.signs

　　d.signals

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