单项选择题

The purpose of the study is__________ ．
A.to look at the link between alcohol and stroke
B.to advise non．drinkers to make a start
C.to encourage light drinkers to become heavy drinkers
D.to promote the sale of alcohol

A.A.to
B.to
C.drinkers
D.to
E.to
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单项选择题
“This element of the unknown”in the third paragraph refers to the fact that__________ ．A.earthquake—related destruction has been beyond calculationB.millions of people have died during earthquakesC.earthquakes may occur anywhere at any timeD.there are other phenomena resulting from earthquakes
A.A.earthquake—related
B.millions
C.earthquakes
D.there
单项选择题
When he arrived at the village，he found__________ the aged and the sick at homE.A.none butB.anyone butC.nothing butD.no other than
A.A.none
B.anyone
C.nothing
D.no
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