----How long are you staying?

----I don't know.___________.

A. That's OK       B. Never mind   C. It depends      D.It doesn't matter

Sales of CDs have greatly increased since the early 1990s, when people_____to enjoy the advantages of this new technology.

A. begin                          B. began                         C. have begun                          D. had begun

________ is often the case, we have worked out the production plan.

A. Which           B. When          C. What           D. As

The____________house smells as if it hasn't been lived in for years.

A. little white wooden                 B. little wooden white

C. white wooden little                 D. wooden white little

The old man, ____________abroad for twenty years, is on the way back to his motherland.

A. to work           B. working              C. to have worked              D. having worked

A man is being questioned in relation to the ________ murder last night.

A. advised          B. attended            C. attempted               D. admitted

It's ten years since the scientist _______on his life's work of discovering the valuable chemical.

A. made for               B. set out                C. took off                D. turned up

-- You haven't lost the ticket, have you?

-- _________. I know it's not easy to get another one at the moment.

A. I hope not       B. Yes, I have        C. I hope so        D. Yes, I'm afraid so

Tom owns _______larger collection of _______ books than any other student in our class.

A. the; 不填               B. a; 不填               C. a; the             D. 不填; the

More patients ___________ in hospital this year than last year.

A. treated         B. have treated          C. had been treated         D. have been treated