题目内容

用单词的适当形式填空。
1. Don't enter the house without _____ ( knock) at the door.
2. Spaceship _____ (with) people has reached other parts of the space.
3. How _____ (be) Paul's party last night?
4. Students are not supposed _____ ( be) late for school.
1. knocking    2. without    3. was    4. to be

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