根据下列句子及所给汉字注释或首字母提示，写出空缺处各单词的正确形式,并将完整答案写到II卷答题纸上。（每空只写一词）1.They struggle/struggled (斗争) f

根据下列句子及所给汉字注释或首字母提示，写出空缺处各单词的正确形式,并将完整答案写到II卷答题纸上。（每空只写一词）
1.They struggle/struggled  (斗争) for peace.
2. They carefully observe/observed （观察）the behavior of deer.
3. The policemen are trained to ddefend  themselves against attacks.
4. He mented (评论) that it was an excellent film.
5. They tried to convince （使确信）him to buy a cheaper car.
6.Disneyland is a famous ttheme  park. 
7. The date of the meeting was advanced （提前）by four days.
8. I don't watch the news because I find it too depressing . (令人沮丧的)
9. If a student at a college mmajors  in a particular subject, that subject is the main one they study.
10. It’s too expensive! We can't aafford  to pay such a price.