Ⅳ. Study the passive voice of modal verbs in the appendix of the textbook, and fill in the blanks with the correct forms of the verbs in brackets. 自学课本附录关于情态动词的被动语态，然后用括号内所给动词的正确形式填空，必要时可加助动词。
1. The old must (take) good care of by us.
2. The sun can (not see) because it's cloudy.
3. Teenagers should (allow) to make their own decisions.
4. The plants may (plant) in spring.
5. Must the room (clean) every day?

1. be taken 2. not be seen 3. be allowed 4. be planted 5. be cleaned

Ⅰ. Choose the proper words from the box and complete the sentences.
从方框中选择恰当的单词，完成下列句子。每空一词，每词只用一次。
strict | allowed | failing | later | pass 
1. I think she shouldn't be to get to school late.
2. Most parents think teachers should be with students.
3. My sister is worrying about her math test.
4. She said she would take the test .
5. I finished my English test early, but I didn't the test.

Ⅰ . 1. allowed 2. strict 3. failing 4. later 5. pass

Ⅱ. Look at the picture of 1a and answer the questions. 看 1a 图片，回答下列问题。
1. Where are they?

2. What happened to the boy?

II . 1. They are in a classroom at school. 2. He was late for school/class.