5．Dale was very n_________ when he stood in front of the teacher．

4．Yesterday an accident h______ to Tony．He's in hospital now．

3．Tom is an e_________ student in our class．He always gets the first place on　 the exams．

2．The 29th Olympic Games will be held in Beijing，the c______ city of China．

　　 根据句意完成已给出首字母或汉语提示的单词，使补全后的句子意义通顺，语法正确。

1．Don't c______ the street when the traffic light is red．