Nobody can explain the mystery ____ he suddenly disappeared.
| A．why | B．what | C．whether | D．which |
Some college students are seen doing _____work they can find to support themselves.
| A．that | B．which | C．whatever | D．no matter what |
But for those interruptions, the meeting _____ half an hour ago.
| A．was finished | B．would have finished |
| C．would finish | D．had been finished |
_____ by the latest electronic toys, the little boy stood in front of the windows, without moving.
| A．To be arrested | B．Arrested |
| C．Having arrested | D．Arresting |
Every day ____ a proverb aloud several times until you have it memorized.
| A．read | B．reading | C．to read | D．reads |
A good listener takes part in the conversation,offering ideas and ___ questions to keep the talk flowing.
| A．raising | B．understanding | C．copying | D．solving |