The drug used to treat this disease causes bad side effects, some of which ____

The drug used to treat this disease causes bad side effects, some of which ____

题型:不详难度:来源:
The drug used to treat this disease causes bad side effects, some of which ________ deadly.
A.isB.are
C.wasD.were

答案
B
解析
B 考察主谓一致。Some of which引导非限制性定语从句,在从句中做主语,修饰先行词bad side effects,故从句中使用复数形式,由此排除AC,由主句的时态和语境可知表示客观性,故使用一般现在时。故B正确。
举一反三
How many countries ________ the European Union made up of, do you know?
A.isB.are
C.haveD.has

题型:不详难度:| 查看答案
—________ one and a half months enough for the project to be finished?
—I am afraid not.The professor is ill and only after he recovers ________ go on with it.
A.Is;he canB.Are;he can
C.Is;can heD.Are;can he

题型:不详难度:| 查看答案
The university estimates that living expenses for international students________around $8,450 a year,which________a burden for some of them.                     (2013·湖南,33)
A.are;isB.are;are
C.is;areD.is;is

题型:不详难度:| 查看答案
All the scientific evidence ________ that increasing use of chemicals in farming ________ damaging our health.                                         (2012·湖南,35)
A.show;areB.shows;are
C.show;isD.shows;is

题型:不详难度:| 查看答案
Mary is the only one of the teachers who ________ a little Chinese because she is one of my friends who ________ been to China.
A.know;haveB.knows;has
C.knows;haveD.know;has

题型:不详难度:| 查看答案
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