【简答题】阅读理解。 Paragraph 1 Scientists have learned a lot about the kinds of food people need. They say that there are several kinds of food that people should eat every day. They are: (1) green and yellow vege...
【简答题】用所给单词的适当形式完成句子。 1. The ____ (true) is even scientists can't agree on why we need to sleep, 2. We ____ (real) need to get a good night's sleep. 3. Sleep ______ (expert) say it's better not to try too h...