1、 My little brother is too young ________ to school.

2、 I ________ these books for three years.

3、 Summer is ________ season of the year.

4、 When the students came into the classroom, the teacher ________ on the blackboard.

5、 She is often ________ at by her classmates.

6、 The earth ________ around the sun.

7、  We are waiting for Li Mei to________ us a good story.

8、  —Hello, Alice. You ________ very happy—Yes. I am happy. My parents are coming to see me tomorrow.

9、 There ________ a teacher and twenty students in the classroom.

10、 题目：—Can I help you?—— Well, I'm afraid the box is__heavy for you,but thank you all the same.

11、  --Who can reach the book on the top shelf? -Jack can. He is ________ boy of us all.

12、 -Can you answer that question? -Sorry, I ________.

13、 How careless he was! He ________ a lot of important ideas while reading.

14、 She ________ ill for five days.

15、 Give me the answer ________ the question.