Vocabulary Test of Units 4 & 6Name ___________根据句意及首字母提示,写出单词的正确形式,使句子意思完整。(I)1. Yang Liwei became a national hero when he r____________ from the space.2. If Jim isn’t in, you may leave a m_______________for him.3. I always get n______________ when I’m speaking in front of a group.4. The air in Tibet is really t____________, people often get sick when they first go there.5. I don’t think it’s a good idea to c____________ others’ home..