The place was flooded ________ it had been raining for several weeks.
| A．because | B．because of | C．ever since | D．as a result of |
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 |
—I’m sorry I broke the glass.
—_____.
| A．I see | B．No problem | C．Forget it | D．You’re welcome |