两艘或两艘以上船舶之间所发生的相互接触，并伴有船体严重损坏而发生的事故称为（）。
A.倾覆
B.碰撞
C.搁浅
参考答案：B
我国最大的咸水湖和最大的淡水湖是（ ）
A．洞庭湖和鄱阳湖
B．鄱阳湖和洞庭湖
C．鄱阳湖和青海湖
D．青海湖和鄱阳湖
句型转换。
1. I watch TV every evening. (用过去时改写)
I ________ TV yesterday evening.
2. It was a fine day yesterday. (对划线部分提问)
________ the ________ yesterday?
3. He did his homework last night. (改为否定句)
He ________ his homework last night.
4. I was in the supermarket yesterday afternoon. (对划线部分提问)
________ you yesterday afternoon?
5. I saw some seals. (改为一般疑问句)
________ you ________ seals?
