(1)
你经常忘记生日和重要约会（这类事情）吗?
(2)
有一种新的互联网服务叫在线日历.
(3)
If you have no time for (going) shopping,...
(4)
But you must remember to check your e-mail every day!
(5)
You'll be sent an e-mail message by the on-line calendar to remind you about your mother's birthday or your friend's graduation day.
括号里的都可以省略掉,是为了帮助理解而添加的.