用所给词的适当形式填空.
1. Let's do our best to help the children who need to _____ (educate).
2. I enjoy _____ (learn) English although it's very difficult for me.
3. If you aren't careful enough , you might make _____ (mistake).
4. You can't _____ ( achieve) a high level of English unless you study hard.
5. Have you got any _____ (knowledge) about Arabic countries.
6. She's so excellent that her parents are very _____ (pride) of her.
