It took the firemen six hours to________ the fire.
| A．put up | B．put down | C．put on | D．put out |
Lucy likes playing ________ ping-pong, but her sister Lily likes playing ______ guitar.
| A．／; ／ | B．the; ／ |
| C．the; the | D．／; the |
______the problem clearly, Mary has to look for lots of information.
| A．To explain | B．Explaining |
| C．Explain | D．Explained |
Thank you for your______,otherwise I couldn’t finish the work on time.
| A．kind | B．kindly | C．kindness | D．kinds |
—Would you mind opening the door?
— ______ .
| A．All right. |
| B．Yes, of course |
| C．Not at all. I’ll do it right away |
| D．It doesn’t matter |
---Do you still remember the first day we met at school?
--- Very clear _____ it was yesterday.
| A．as long as | B．as if |
| C．as soon as | D．as a result |