4 . I was observing and copying the behaviors of my cat ________ my mom came in, ________ with shock.

A．when; freezing

B．while; frozen

C．when; frozen

D．while; freezing

8 . 每个句子有一处错误，在错的词下面划一横线，并在该词下面写出修改后的词。
1. Mid-autumn Festival is a tradition Chinese festival and it is the custom to eat moon-cakes.
2. Tom was too frighten to say a word.
3. Faced with so many problems, Mary was calmly and dealt with them.
4. I am sure you will have trouble complete the difficult task now.
5. Neither my parents nor I are at home today, so you’d better not come.
6. Parents should be responsible of family education.
7. Obvious, the visitors are attracted by the beautiful scenery.
8. He made a apology to his teacher for his mistakes.
9. After graduate, I find it hart to get a good job in big cities.
10. He had an accident yesterday. That is because he is absent from the meeting.

9 . 选词填空

calm down,       take a breath,       be crazy about,       let down,       apologize to,    concentrate on,     help out,     work out,     communicate with,     be filled with

1. In all those years he never worked hard, which ________ his parents ________.
2. A swimmer can’t swim under water very long, because he must ________.
3. I have ________ this film since I first saw it on TV.
4. In my opinion, parents and children should ________ each other and show respect for each other.
5. The famous actor keeps fit by ________ for an hour every morning.
6. If you keep a positive attitude, your life will ________ happiness.
7. ________ the good things about the Internet.
8. Hearing what Father had said, the crying child soon ________.
9. You must ________ your parents for being so rude.
10. He is the person who ________ me ________.