根据所给汉语提示翻译句子。
1. 你应该见面说"好"。
You are say hello when you meet.
2. 昨天我花了大约两小时完成了作业。
It me two hours to my homework yesterday.
3. 听到那悲伤的消息,他忍不住哭了。
He couldn’t ________ ________ when he heard the sad news.
4. 在你的帮助下我才能顺利完成工作。
I couldn’t finish the work well _______your ________.
5.自从2000年以来我的家乡发生了很大的变化。
Great changes have in my hometown since 2000.
1.supposed to 2.took finish 3. help crying
4. without help 5.taken place