— is the World Cup held?
— Every 4 years.
| A．How soon | B．How often |
| C．When | D．Where |
The water in the river nearby will be dirtier than before if nothing __________.
| A．has done | B．will be done |
| C．is done | D．was done |
―Is Tom coming to the concert this evening?
―No, he _________ be at the concert. He _______ abroad.
| A．mustn’t, has been | B．mustn’t, has been to |
| C．can’t, has gone to | D．can’t, has gone |
Foreign visitors will get lost easily in new Taixing ________ they have a map.
| A．until | B．if |
| C．whether | D．unless |
―What can I do for you?
―__________.
| A．I’m looking for a tie for my father |
| B．Yes, you can give a tie to me |
| C．No, I can do it myself |
| D．I can do what I want |
Every year, _______ visitors come to Taixing to enjoy the delicious food, such as Huangqiao cakes, Xuanbao dumplings and so on.
| A．two hundreds | B．thousand of |
| C．thousands of | D．two hundred of |