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新概念英语第四册课选择题：Lesson38 Water and the traveller

2018-09-27 15:30:00来源：网络

新东方在线新概念小编为大家带来新概念英语第四册课后练习多项选择题一文，希望对大家的新概念英语学习有所帮助。更多精彩尽请关注新东方在线新概念英语学习网(http://nce.koolearn.com )!

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Multiple choice questions 多项选择题

Choose the correct answers to the following questions.

Comprehension 理解

1 Piped water could be contaminated, especially if ____.

a.it is supplied from the sewage system

b.it isn't safe by the time it reaches the tap

c.doesn't flow continuously through the pipes

d.it comes from farmland

2 Make sure that bottled drinks are opened in your presence, presumably ____.

a.to be assured that it was filled at a bottling plant

b.to make sure that it isn't too acidic to drink

c.to check that the rim of the bottle is clean and dry

d.because water supplies are uncertain

3 You should avoid ice in drinks because ____.

a.you don't know if it has been made with contaminated water

b.you can be sure it hasn't been boiled first

c.because it always comes from an unknown source

d.it hasn't been treated in your presence

4 You can't use alcoholic drinks to sterilize water because ____.

a.only ethanol is capable of doing this

b.the alcoholic content is rarely sufficiently concentrated to do the job

c.methylated alcohol is very poisonous

d.it's not a very good disinfectant

Structure 句型

5 Piped water____ safe at its source,____ it isn't always safe. (1.3)

a.must be…and

b.may be…but

c.should be…though

d.will be…even if

6 It____ to drink tap water of uncertain quality. (1.5)

a.isn't advisable

b.is advisable

c.isn't required

d.is required

7 Drinks can be cooled ____ them on ice. (1.15)

a.so as to place

b.in placing

c.if you place

d.to place

8 ____ rely on alcohol to sterilize water. (1.16)

a.Not

b.Don't

c.Must not

d.Not to

Vocabulary 词汇

9 Make sure that all bottles are opened ____. (1.8)

a.at once

b.now

c.at present

d.in front of you

10 ____ any cold drink from an unknown source. (1.12)

a.Discard

b.Prevent

c.Deny

d.Don't accept

11 You should not ____on alcohol to sterilize water. (1.16)

a.depend

b.insist

c.lean

d.support

12 Those planning a trip to____ places…(1.21)

a.away

b.far away

c.contaminated

d.overseas

以上就是新东方在线新概念英语学习网为你带来的新概念英语第四册课后练习多项选择题，更多精彩内容。敬请关注新东方在线新概念英语学习网（http://nce.koolearn.com）。

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