用所给词的正确形式填空。

1.I have a bad toothache.  I should go to see a____    (dental).    

2. Group 3             (do) some cleaning yesterday.

3.I missed a lot of class because of             (ill) last year.

4.I hope you feel               (good) soon.

5. Could you give me some____      (advise) on how to study English well?