用所给单词的适当形式填空。

1. My _____(big) problem is that I can't memorize the English new words.

2. His life_____(change) a lot in the last few years.

3. My grandfather used _____(swim) in the river when was young.

4. Would you mind my_____(shut) the door?

5. It often      (take) us two hours_____(do) our homework every day.

6. I used to be afraid of _____(speak ) in front of a group.

7. I am very hungry, because I_____(not have) my dinner yet.

8. We find it easy_____(learn) English well.

9. Don't give up_____( try) , you will make it in the end.

10. He didn't _____(use) to like tests, but now he likes them very much.