The heavy snow lasted for a week, _____ a serious traffic confusion in the whole area.
| A．causing | B．caused | C．having caused | D．being caused |
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 |