Unit 4Topic3SectionC 课时练
Ⅰ.单项选择。(10分)
( )1.—Do you know for _____ that it was made in 1980?
—Yes, I do.
A.certain B.certainly C.sure D.doubt
( )2.There are many kinds of pollutions, _____, air pollution, light pollution and so on.
A.for instance B.example C.however D.instance
( )3.Mr. Smith is our English teacher _____ has taught us for three years.
A.whom B.who C.where D.which
( )4.The baby should _____ at home.
A.be taken care B.be taken care of
C.take care D.take care of
