题目内容：

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)

1.He is very smart．He went to university at the a    of 15．

2.Never cross the street when the traffic lights are r    ．Wait until it’s green．

3.It doesn’t look like rain，so you needn’t b      your umbrella with you．

4.I miss my family and really feel l      without any friends in this new city．

5.Where is my watch?I can’t f      it．