补全对话。
A. How can we reuse this envelope? B. That's a good idea! C. Can I throw away this envelope? D. We can refuse it. E. Do you have any ideas, Mum? |
Mum：Look at your bedroom，Joe．What a mess!Please tidy it up．
Joe：Don't worry,Mum．I'll do it right now．____
Mum：No．We should keep it．____
Joe：____
Mum：We can write on the other side of it．We can draw a "No smoking" sign on it．
Joe：How about these old clothes?____
Mum：Yes，I do．Please give them to me．I can make new dolls with them．
Joe：____
+NaOH CH3﹣CH=CH2+NaCl+H2O该反应式也可表示为： 
CH3﹣CH=CH2下面是八个有机化合物的转换关系．请回答下列问题： 
