题目

Although many Chinese students say that their knowledge of English grammar is good, most would admit that their spoken English is poor. Whenever I speak to a Chinese student, they always say, “My spoken English is poor.” 【1】 I would like to suggest that there may be some reasons for their problems with spoken English.First, they fail to find suitable words to express themselves due to a limited vocabulary. 【2】However, you can speak with a limited vocabulary, if you choose a positive attitude. Others will follow you as long as you use the words that you know.【3】Sometimes they ma直线y=3的一个单位法向量是______．