-----We are going to Jiuzhaigou this summer. ------ ________________.
| A．Have a good time | B．Help yourselves | C．I hope so. | D．That’s right. |
Battery-operated slippers are used________seeing in the dark．
| A．to |
| B．as |
| C．by |
| D．for |
The Eiffel Tower________by the French engineer Alexandre Gustave Eiffel for the Paris Exposition(巴黎博览会)of 1889．
| A．designed |
| B．was designed |
| C．will design |
| D．will be designed |
—I won’t come to the party unless Sue________，too．
—You mean if Sue comes，you will come．
| A．will invite |
| B．invites |
| C．invited |
| D．is invited |
It________me half an hour to reach the top of the mountain．
| A．spent |
| B．cost |
| C．took |
| D．paid |
Fifteen-year-olds________to have jobs in China．
| A．is not allowed |
| B．are allowed |
| C．is allowed |
| D．are not allowed |