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 ______.

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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

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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’with.(11.7-8)

a.where

b.who

c.whom

d.-

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

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the air 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

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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)

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a.guides

b.notices

c.signs

d.signals

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