爸爸从上午7：30开始做机器零件，一直做到12：30，如果他每小时做8个零件，上午一共做了多少个零件？

改错。

1. Can you point out the house which you live? _______

2. I don't know the person to who you are speaking. _______

3. They will never forget the days which they stayed together. _______

4. Dongtou is a beautiful island and where we can enjoy delicious seafood. _______

5. The book, which he paid 6yuan, is worth reading. _______