六年级英语题

Jack is my good friend. He's thirteen years old. He is young, he wants to b______ an astronaut. He wants to fly a spacecraft. He studies very hard. Jack has a sister, her name is Jane. She is eleven years old, she d______ like to fly a spacecraft ,and she likes to make sick people better,so she wants to be a d_______, they're in the same school. They are both good students.

根据首字母提示填空，大家帮忙一下。
这是一张拓展练习,很多没教过呢,
我想问:第二个填doesn't,但它后面为什么要用and?

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