know why.

　The next day everything changed. My friend was back to school. I was praised for my homework. Everyone stared at me less. Some started to be a little friendlier towards me. I felt at home at last here. My teachers also seemed pretty nice.

( ) 21. If the author didn't skip, he should study in ______.

A. the fourth grade B. the sixth grade

C. the seventh grade D. the eighth grade

( ) 22. What may make the author curious?

A. What his old friends are doing

　　 B. How high school students study

　　 C. How he will do his high school homework

　　 D. What the eighth graders' homework is

( ) 23. Why did the author always keep his eyes on the whiteboard and the textbook?

A. To pay attention to his teachers

B. To attract his teachers' attention

C. To follow his teachers' teaching

D. To avoid meeting others' eyes

( ) 24. According to the passage, we know that the author _______.

A. got along well with his new class very soon

B. felt sorry about having skipped two grades