根据汉语提示，用短语或单词的正确形式填空，每空一词。

1. Maria taught the children to sing lively songs and perform short plays

    to ________ them ________ (使……高兴起来).

2. I'm looking forward to ________ (收到……的来信) you.

3. He is always ________ (对……满意) everything in life.

4. I am a new student, but I can ________ well ________(与……友好相处) all my classmates.

   They all like me.

5. We are sure that conditions here will make you feel ________. (舒服的)

将1-氯丙烷跟NaOH的醇溶液共热，生成的产物再跟溴水反应，得到一种有机物，它的同分异构体有（除它之外）（　　）

A．2种

B．3种

C．4种

D．5种