1. It’s dangerous for him to _____ (漫游) aimlessly outside so late.
2．Usain Bolt set an _____ (难以置信的) world record in the 100-meter race at the Beijing Olympics.
3．We missed the first few _____ (场景) of the play because we were caught in a traffic jam.
4．It wasn’t your _____ (过错)．You needn’t apologize to him.
5．The job is not tiring at all. On the _____ (相反的)，it’s very relaxing.
6．By law，the youth under eighteen are not _____ (允许) to enter net bars.
