问题
补全对话，情景问答
完成对话。
Jane: Who is the girl on the right?
Bill: That is Sarah. She is very pretty.
Jane: Yes, I think so. Does she work 1_______?
Bill: Yes, she does. She is the 2_______ hard-working student in our class.
Jane: What is she 3_______?
Bill: She is very friendly and polite.
Jane: What 4_______ she like to be in the future?
Bill: She'd like to be a social worker.
Jane: 5_______ too.
答案
1. hard 2. most 3. like 4. would 5. Me
只用乙炔为有机原料合成乙酸乙烯酯（CH3COOCH＝CH2），合成路线如下：