【自学探究】
一、根据中文用所给单词的适当形式填空
1.We can (预定）train tickets on this website.
2.Can you use English in your （日常的）communication?
3. -----Have you ever been tp （非洲）？
-----No,never, I really hope I can go there some day.
4.You are coughing so hard. You must go to （看）the doctor.
