17.In fact, there is no _______ liberty in any country.
A.adequate
B.absolute
C.private
D.practical
18.There is too much noise outside. I can not _______my attention on my work.
A.connect
B.flat
C.fill
D.concentrate
19.While studying at U.C.L.A.,Mr.Wang _______ his old friend, whom he has not seen for nearly twenty years.
A.encountered
B.whispered
C.swung
D.maid
20.The _______ production of engines in our factory has doubled this year.
A.manual
B.annual
C.amount
D.alike
答案:
11.B 12.D 13.C 14.B 15.C
16.C 17.B 18.D 19.A 20.B
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