1 . Why do I________(以做……而告终) all the work by myself? (根据汉语提示填空)

2 . ______________________, he and his parents became wildly excited. (on doing)
一收到大学录取通知书，他和他的父母变得异常兴奋。

3 . 这个男孩花很多钱玩电脑游戏，这让他的父母非常生气。
The boy spent much money ________   ________   ________, which made his parents extremely annoyed.

4 . 他在和朋友交谈中度过了愉快的一小时。
He spent a pleasant hour _____ _____ _____ _____.

5 . While abroad those years, I always ____________________.
在国外的那些年里，我总是盼望能收到父母的来信。