---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 |
Teenagers are supposed to ________ their seats to the old on bus.
| A．pass | B．offer | C．sell | D．provide |
-- Where is Paul, do you know?
-- He ________ the library. He won’t return until nine.
| A．has been to | B．has gone to |
| C．goes to | D．went to |
-- Coffee or tea?
-- _______. Just a glass of water.
| A．Both | B．Neither | C．None | D．Either |
-- Never ________ today’s work till tomorrow.
-- Yes. It’s a good habit.
| A．put up | B．put on |
| C．put off | D．put down |
-- I called you this morning, but nobody answered it.
-- Oh, we ______ some shopping at the supermarket.
| A．are doing | B．were doing |
| C．have done | D．did |