108. Dr. Manette had been mentally ____ by his long years alone in prison and his hair had turned white.
A. disturbed B. troubled C. worried D. damaged
107. The Curies are best known for ____ radium and they won the Nobel Prize in 1903.
A. discovering B. inventing C. finding D. creating
106. Where are my keys? They seem to have ____.
A. found B. appeared C. disappeared D. discovered
105. The waters of this great lake, which is also the world's deepest, have been ____ by waste from a chemical factory.
A. cleaned B. cleared C. dirtied D. thrown
104. --- What do you do in the theatre?
--- I ____ plays.
A. act B. direct C. perform D. watch
103. Can you _____ the difference _____ American English and British English?
A. tell; among B. judge; between C. tell; between D. say; between
102. In the minority nationality the custom doesn’t ____ and has come down from generation to generation.
A. die away B. die of C. die from D. die out
101. Many English teachers like to _____ dictation _____ their students.
A. have; to B. take; on C. make; on D. give; to
100. My cousin wants to be a scientist and _____ science of nuclear.
A. devote to B. devote for C. devote himself to D. devote himself for
99. China is the biggest _____ country, while the U.S.A is the biggest ____ country.
A. developed; developed B. developing; developed
C. developing; developing D. developed; developing