改错1we'll have a five days holiday on National Day
2Rarely she has been seen around these days,because she is busy preparing for an important exam
3Not all the actors are enough brave to enter for the competition
4The injury in his back caused great pains to him
5I often see him walking to his office in the morning
6 When I passed Jone's classroom,I saw her clean the blackboard
7It is well-known,Taiwan is part of China
8Experts say having good diet plays an important part in keeping fit
9He has got a bad cold,and that's why he played football in the rain
10Lily has some problems about her literature lessons