1 . I’m s__________ about running. It’s the only thing I’ve ever wanted to do.

2 . 一旦作出承诺，你就必须严肃对待它们。
Once you make promises, you have to _______ _______ _______ them.

3 . Jack is serious ________ his study, so he is never absent from the class.

A．from

B．for

C．about

5 . 仔细阅读下面5个句子，然后用下面方框中所给的单词或短语填空，使每个句子在结构、句义和逻辑上正确。（提示：方框中有两个单词或短语是多余的。）

took up / avoid / doubt / praise / looked up / serious / celebrate

1. I always leave the house early to ________ heavy traffic because I think it’s impolite to keep others waiting.
2. Later I ________ the history of Erquan Yingyue and I began to understand the sadness in the music.
3. I’m ________ about running because it’s the only thing I’ve ever wanted to do.
4. Others think it was built to ________ a victory over an enemy.
5. The Chinese are without ________ the ones who best understand the nature of tea.

6 . China has made great progress in many fields. We really ______ our amazing China.

A．take pride in

B．take care of

C．are serious about

7 . You should be ________ about the problem, young man! It’s not a joke.

9 . Our English teacher is s______ about our study.

10 . 我妈妈认真对待她的工作和生活。
My mother ________ ________ ________ her work and life.