The bus hit the huge stone by the road heavily _________ he could stop it. A. after B. before C since D. until
107. The Curies are best known for ____ radium and they won the Nobel Prize in 1903.
106. Where are my keys? They seem to have ____.
105. The waters of this great lake, which is also the world's deepest, have been ____ by waste from a chemical factory.
104. --- What do you do in the theatre? --- I ____ plays.
103. Can you _____ the difference _____ American English and British English?