looked up into her eyes. She smiled at me, "Thanks. "

　　Kate and I stayed roommates for the rest of the year. We didn't always agree, but we learned the key to living together: giving in, cleaning up and holding on.

21.What made Kate so angry one evening?

A.She couldn't find her books.

B.She heard the author shouting loud.

C.She got the news that her grandma was ill.

D.She saw the authors shoes beneath her bed.

22.The author tidied up the room most probably because_________ .

A.she was scared by Kate's anger

B.she hated herself for being so messy

C.she wanted to show her care

D.she was asked by Kate to do so

23.How is Paragraph 1 mainly developed?

A.By analyzing causes.

B.By showing differences.

C.By describing a process.

D.By following time order.

24.What might be the best title for the story?

A.My Friend Kate

B.Hard Work Pays Off

C.How to Be Organized

D.Learning to Be Roommates

Passenger pigeons (旅鸽)once flew over much of the United States in unbelievable numbers. Written accounts from the 18th and 19th centuries