55. There have been many changes in _____ history of _____ English language.
| A．a; the | B．the ; / | C．/; the | D．the; the |
There is no _____ that the Chinese people will present to the world a successful, splendid
and unforgettable exposition（博览会）.
| A．belief | B．way | C．doubt | D．need |
The H1N1 flu, often _____ “swine flu” by the public media, is a disease which can be prevented, controlled and cured.
| A．calls | B．to call | C．calling | D．called |
The US auto (汽车) industry, a symbol of the American spirit, narrowly escaped a sudden breakdown, _____ China has become the world’s top automaker.
| A．when | B．while | C．but | D．although |
— _________ Betty this morning?
— Not yet, but she is sure to be here before noon.
| A．Did you see | B．Will you see | C．Do you see | D．Have you seen |
--- Where is Jack? I can’t find him anywhere.
--- He ______ his homework upstairs.
| A．might have done | B．must have done | C．might be doing | D．must do |