Mike is very, 　1　 at maths. Mary, his sister doesn't do 　2 　in it.Mike often helps her with her maths. One night Mike and Mary took out their exercise-books and began 　3　 their lessons. Soon Mike finished his homework, but his sister 　4　 . She 　5　　　 work out the last problem. “Let me 　6　　　 you,” said Mike.“No, please 　7　　　, I'll do it 　8　 ,” said Mary. She thought and thought,and 　9　　 　an hour she worked it out. She was very, very tired, but very, very 　10　　　.

　　Jimmy is very 1 at maths . Mary , his sister, doesn't do well 2 it . Jimmy often helps her with her maths . One night Jimmy and　　

　　Mary took out their exercise?Books and began 3 their lessons. Soon Jimmy finished 4 his homework. But his sister 5 . She couldn't work 6 the last problem (问题). “Let me 7 you,”said Jimmy. “No, please 8 . I'll do it myself,”said Mary, She thought hard,an hour 9 , she worked it out. She was very tired, but very, very 10 .

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