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)
小题1:He is very smart．He went to university at the a of 15．
小题2:Never cross the street when the traffic lights are r ．Wait until it’s green．
小题3:It doesn’t look like rain，so you needn’t b your umbrella with you．
小题4:I miss my family and really feel l without any friends in this new city．
小题5:Where is my watch?I can’t f it．