1) I made a lot of mistakes in my homework, so I decide to redo it.
2) Don`t misunderstand my words! I say that I don`t want to have a Chihuahua but not a dog at all.
3) They overcharged us at the shop. Thanks God they found the mistake and returned as the money.
4) She underestimated the importance of her math test and didn`t prepare to it properly.
5) I can`t find my English course book, it has just disappeared.