按要求改写句子。

1. Sometimes you're supposed to come early. (改为否定句) 

   Sometimes you _______ _______ supposed to come early.

2. Tom visits his grandparents once a week. (对划线部分提问)

    _______ _______ does Tom visits his grandparents?

3. My pen pal is from America. (用Japan 改为选择疑问句)

    Is your pen pal is from America _______ _______?

客户端计算机第一次登陆“税务综合办公信息系统”时，需要安装系统所需的“文档处理器”，操作步骤如下：

打开IE浏览器—在地址栏里输入“税务综合办公信息系统”服务器的地址（如：71.12.50.4/odps），登陆界面后点击—“工具下载”—“常用工具下载”—“文档处理器v4.03。