按要求改写句子。

1. We went to the store this morning. (改为否定句)

________________________________________________________ 

2. Did you buy a ball at the store? (改为肯定句)

________________________________________________________ 

3. We played basketball. (改为一般疑问句)

________________________________________________________ 

4. We bought a pair of runners. (就划线部分提问)

________________________________________________________ 

患者，冯某，男，71岁，高血压15年，心电图示左心肥大，既往无风湿病史，彩色多普勒超声检查示主动脉瓣回声增厚增强，主动脉瓣口舒张期中度以上反流血流信号。

该患者还可能伴发的是（）

A.二尖瓣脱垂

B.主动脉瓣二叶瓣

C.二尖瓣环钙化

D.肺动脉瓣狭窄

E.三尖瓣关闭不全