of them knows French, so I have to ask a fourth person for help. A. Neither B. Either ——青夏教育精英家教网——

摘要： of them knows French, so I have to ask a fourth person for help. A. Neither B. Either C. Both D. None

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There is a piece of work．It takes Mr．A alone 20 days to finish，and Mr．B 30 alone days to finish．It takes them（　　）days to work together to finish the work．

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There are nineteen boys and twenty-eight girls in our class. 1 　the boys is English. His 2 is Sam. He is thirteen. Two of the 3 are American. They are twins. 4　names are Lucy and Jane. They are twelve. They are my 5　. All of the other boys and girls are 6 　. We all like the English boy and the American girls, 7 they like us, too. We play games together（一起）. We help 8 and they help us.
　　Look, there 9 the twins! They are coming this way. Let's 10 hello to them.

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There is a piece of work．It takes Mr．A alone 20 days to finish，and Mr．B 30 alone days to finish．It takes them（　　）days to work together to finish the work．

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