Lin Tao is doing his math exercises. Li Lei comes (1) to him and stands beside him. He looks (2) the exercise-book and says to himself,“Oh, it's (3) easy.”

　　Lin Tao is worried. He is good at math. He is one of the best (4) in his class. Li Lei is a player on the school basketball team（队）. He doesn't do (5) in his lessons. “He can work out this problem,”thinks Lin Tao.“I must learn from him. ”

　　Lin Tao looks up at Li Lei, “Could you (6) me how to find the answer?”He asks Li Lei.

　　“Yes,”answers Li Lei. “But you must help me (7) ”

　　“What can I do (8) you?”says Lin Tao with a smile.

　　“Oh, you can help me do the Chinese exercises.”

Lin Tao does the exercises for Li Lei. After he (9) them, he asks, “Now can you tell me (10) to work out the math problem?”

　　“Yes, just choose（选择）an easier problem to work out!”says Li Lei.