David was responsible and hardworking, _____ he was promoted from a clerk to a manager.
| A．which | B．as | C．for what | D．for which |
Teenagers have reached a point in their life_____they are supposed to make decisions of their own for the first time.
| A．which | B．where | C．how | D．why |
They are considering ____ the house before the prices go up.
| A．purchase | B．purchasing | C．purchased | D．to purchase |
_______ more about Participant Service of Expo 2010, Shanghai China, call Hotline +86-21-962010.
| A．To find out | B．Finding out | C．Find out | D．Having found out |
— Why did you leave that company?
— I _______ a better position at IBM.
| A．offer | B．offered | C．am offered | D．was offered |
— She looks very happy. She _______ have passed the exam.
— I guess so. It’s not difficult after all.
| A．should | B．could | C．must | D．might |