按要求完成句子。

1. Toby won aprize last time.（改为一般疑问句）    

________Toby________ a prize last time?

2. Did she see any seals there?(改为陈述句）    

She________  ________ seals there.

3. She eats some ice cream every day.（用yesterday改写句子）  

She________ some ice cream yesterday.

4. What else did you do?（改为同义句）  

What________  ________ did you do?

当使用fstrearn流类定义一个流对象并打开一个磁盘文件时，文件的隐含打开方式为

A．ios::in

B．ios::out

C．ios::int|ios::out

D．没有