问题
填空题
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.
答案
1. knocking 2. without 3. was 4. to be