中国大学MOOC: It’s not necessary to feel a closed door for heat before opening if there is a fire.
举一反三
- In the Great Fire of London in 1666, people managed to feel the heat miles away.（)
- 中国大学MOOC: _____ is really necessary before business negotiation
- He left the room____. A: with the door closing B: with the door is closed C: with the door being closed D: with the door closed
- "Do you mind _________?" "Go ahead." A: opening the door B: your opening the door C: my opening the door D: I opening the door
- 中国大学MOOC: (5) Warming up before playing is not necessary for some sports.