题目内容
11. Not only are mothers not paid but also most of their __________ or difficult work is unnoticed.
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12. If you make a(n) __________ to do something, you try very hard to do it.
13. With computer you can watch the latest movies in the __________ of your own home.
14. Ater high school, I'd like to go to college and __________ in business administration.
15. The conference is a good place to __________ information and exchange ideas.
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