—What should we do to prevent H7N9 bird flu?
—We must from crowded places.
| A．come out | B．pass away | C．put out | D．keep away |
Here are some apples. You _________ take any one if you like.
| A．must | B．can | C．need | D．should |
Look at this new dictionary. It doesn’t __________ me too much.
| A．spend | B．pay | C．take | D．cost |
— Could you tell me ____ for the meeting this morning?
— Because the traffic was bad.
| A．why did you come late | B．why you came late |
| C．why do you come late | D．why you come late |
_________ trees have been planted these years.
| A．Million | B．Millions | C．Million of | D．Millions of |
— Peter, ________ do you visit your grandparents?
— Twice a month.
| A．how long | B．how soon | C．how far | D．how often |