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1. If he doesn′t apologize, I will never invite him here again.
Unless he . 

2. They left early because they didn′t want to get caught in the traffic. (avoid)
They left early . 

3. Mr. Brown, who lives next door to my house, is very helpful.
Mr. Brown is very helpful; we . 

4. I had been instructed to drive out of town and I began to acquire confidence.
After having . 

5. I would like you to help me do this English exercise.
Do you mind ?