35.The scientist's discoveries were of great help to mankind.
A.a;the B.a;/ C./;/ D.the;the
34.While building a bridge over the Changjiang River, .
A.a big rock was discovered in the water
B.there was a big rock discovered
C.a big rock discovered in the water
D.the workers discovered a big rock in the water
33.I didn't know who for the broken window.
A.to be blamed B.to blame C.is to blame D.is to be blamed
32.I can't to London,because the lines are always busy.
A.get out B.get through C.go through D.get along
31.Though they are not sure of the long-term ,all the scientists agree to start the research immediately.
A.affect B.result C.effect D.effort
30.We gave them a lot of help in the of money.
A.type B.kind C.form D.way
29. many times,he still doesn't know how to do it.
A.Being told B.He has been told
C.Having told D.Having been told
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