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Multiple choice questions 多項(xiàng)選擇題
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
1，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
2，It____ to drink tap water of uncertain quality. (1.5)
a.isn't advisable
b.is advisable
c.isn't required
d.is required
3，Drinks can be cooled ____ them on ice. (1.15)
a.so as to place
b.in placing
c.if you place
d.to place
4，____ rely on alcohol to sterilize water. (1.16)
a.Not
b.Don't
c.Must not
d.Not to
Vocabulary 詞匯
1，Make sure that all bottles are opened ____. (1.8)
a.at once
b.now
c.at present
d.in front of you
2，____ any cold drink from an unknown source. (1.12)
a.Discard
b.Prevent
c.Deny
d.Don't accept
3，You should not ____on alcohol to sterilize water. (1.16)
a.depend
b.insist
c.lean
d.support
4，Those planning a trip to____ places…(1.21)
a.away
b.far away
c.contaminated
d.overseas
Multiple choice questions 多項(xiàng)選擇題
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
1，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
2，It____ to drink tap water of uncertain quality. (1.5)
a.isn't advisable
b.is advisable
c.isn't required
d.is required
3，Drinks can be cooled ____ them on ice. (1.15)
a.so as to place
b.in placing
c.if you place
d.to place
4，____ rely on alcohol to sterilize water. (1.16)
a.Not
b.Don't
c.Must not
d.Not to
Vocabulary 詞匯
1，Make sure that all bottles are opened ____. (1.8)
a.at once
b.now
c.at present
d.in front of you
2，____ any cold drink from an unknown source. (1.12)
a.Discard
b.Prevent
c.Deny
d.Don't accept
3，You should not ____on alcohol to sterilize water. (1.16)
a.depend
b.insist
c.lean
d.support
4，Those planning a trip to____ places…(1.21)
a.away
b.far away
c.contaminated
d.overseas