如何使用 "in" 造句

1. Tell us in the comments .
在评论中告诉我们。
2. Hitler has died in berlin .
希特勒在柏林去世了。
3. Opened on friday in manhattan .
周五将在曼哈顿上映。
4. Now germany is joining in .
现在德国也参加进来。
5. Congress has also joined in .
美国国会也参与进来。