根据下列句子及所给单词的首字母写出所缺单词。在填写答卷时，要求写出完整单词。 (每空限填一词)
He is very smart．He went to university at the a   of 15．
Never cross the street when the traffic lights are r   ．Wait until it’s green．
It doesn’t look like rain，so you needn’t b     your umbrella with you．
I miss my family and really feel l     without any friends in this new city．
Where is my watch?I can’t f     it．