欧洲几个因为被完整的古代城墙包围而列为世界遗产的城市有（）
A.阿维拉、图卢兹、卢戈
B.阿维拉、卡尔卡松、奥朗日
C.阿维拉、卡尔卡松、卢戈
参考答案：C
已知点A（-2，-3）、B（3，2），若直线l：y=kx+1与线段AB有公共点，则斜率k的取值范围是______．
按要求改写句子。
1. There is some water in the bottle. (改为否定句)
(1) _____________ _____________ _____________ water in the bottle.
(2) _____________ _____________ _____________ water in the bottle.
2. There are twelve months in a year. (改为一般疑问句并作肯定回答)
_____________ _____________ _____________ _____________ in a year?
Yes, _____________ _____________.
3. There is a child near the river. (改为复数)
_____________ _____________ _____________ _____________ near the river.
4. There are three foreign teachers in our school. (对画线部分提问)
_____________ _____________ foreign teachers _____________ _____________ in your school?
5. I have a clock on my desk. (用There be句型改写句子)
_____________ _____________ _____________ _____________ on my desk.
