11.The noise was caused by a dog _____ a cat through the gar

11.The noise was caused by a dog _____ a cat through the garden.
A.catching B.fighting C.following D.chasing
12.Chopsticks of bamboo or wood can be bought in _____ of pairs; 10 is the usual number
A.bunches B.units C.bundles D.pieces
13.Though Japan is now an economic giant,it has one vital weakness,that is,it lacks the _____ material necessary for its industry.
A.primitive B.crude C.raw D.primary
14.The ship’s generator broke down,and the pumps had be to operated _____ instead of mechanically.
A.manually B.artificially C.automatically D.synthetically
15.The government gave a very _____ explanation of its plans for industrial development.
A.extensive B.widespread C.universal D.comprehensive
16.The Adventures of Huckleberry Finn is considered Mark Twain's ________.
A.masterpiece.B.production C.work D.writing
17.The steps have been _____ away by the feet of thousands of visitors.
A.got B.put C.worn D.taken
18.They were very emotional at that moment and could not talk about the matter like ________ people.
A.sensitive B.genuine C.intelligent D.rational
19.The ________ lawyer made a great impression on the jury.
A.protecting B.guarding C.defending D.shielding
20.The mayor was asked to ________ his speech in order to allow his audience to raise questions.
A.constrain B.conduct C.condense D.converge

11.D 12.C 13.C 14.A 15.D 16.A 17.C 18.D 19.C 20.B