11.At first, the speaker was referring to the problem of pollution in the country, but halfway in her speech, she suddenly _____ to another subject.
A.committed
B.switched
C.favored
D.transmitted
12.At no time _____ other countries.
A.China will invade
B.will invade China
C.will China invade
D.invade will China
13.Be here on Friday _____ the latest.
A.at
B.by
C.for
D.in
14.Because the whole country is in a financial dilemma, the government calls on us to _____ economy.
A.make
B.practice
C.carry
D.develop
15.Before he started the work, I asked the builder to give me an _____ of the cost of repairing the roof.
A.assessment
B.estimate
C.announcement
D.evaluation
16.Beryl hardly ever goes to _____ the cinema.
A.neither the theatre or
B.either the theatre nor
C.neither the theatre nor
D.the theatre or
17.Beside being expensive, the food tastes _____.
A.badly
B.too much bad
C.too badly
D.bad
18.Britain's press is unusual _____ it is divided into two very different types of newspaper: the quality press and the popular press.
A.in how
B.in what
C.in which
D.in that
19.By moving the radar beam around slowly in circles, we can _____ the surroundings.
A.explore
B.expose
C.exploit
D.expand
20.Cancer is second only _____ heart disease as a cause of death.
A.of
B.to
C.with
D.from