— ________ do you think it was ________ made Jane so cross?
—Being looked down upon in public yesterday.
| A．When; who | B．Who; that |
| C．Which; what | D．What; that |
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' |