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.
