—What should we pay more attention to if we go north in winter, Mum?
—Nothing much. Take warm clothes _____
the weather is cold.
| A．as long as | B．now that |
| C．if | D．in case |
________ English will help to communicate _____ people from different countries in the world.
| A．Known; with | B．Knowing; with | C．To know; to | D．To know; in |
— I have just had my watch repaired.
—How much did they ______ you?
| A．pay | B．charge | C．cost | D．spend |
— Can I help you, madam?
— Yes, I bought this air conditioner here yesterday, but it _____ now.
| A．didn’t work | B．won’t work | C．can’t work | D．doesn’t work |
She knows that as a secretary she must be pleasant and helpful no matter how busy she is or what kind of ____ she may be in.
| A．mood | B．mind | C．form | D．thought |
— ____ sweep the classroom yesterday？
—I was playing tennis with my friend．
| A．Why not | B．Why didn't | C．Why don't | D．Why didn't you |