---What are the police doing there?
---They are _______ the building. A robber ran into it just now.
| A．finding | B．searching for | C．searching | D．looking for |
—Could you tell me_____________?
—Certainly. In half an hour.
A. when the high speed train will arrive
B. when the high speed train arrived
C. if the high speed train has arrived
—Are you going to but a new camera?
—Yes. But there are so many cameras that I can’t decide______________.
A. how to use B. where to sell C. which to buy
—Shall I take a taxi?
—No, we_____________. It’s not far from here.
A. shouldn’t B. mustn’t C. needn’t
—Oh, my God! I can’t find my key to the office.
—Don’t worry. Perhaps it______________ in your home.
A. left B. has left C. was left
—Alice, would you mind not playing the guitar? I ___________on the phone.
—Oh, sorry, mom.
A. talked B. was talking C. am talking