根据下列句子的意思及所给的汉语提示，写出空缺处单词、固定短语或固定搭配的正确形式。

1．This is our _____________________ （三） time to plant trees．

2．I’m not really _____________________ （饥饿）．I’ll just have an ice cream．

3．Computer is one of the greatest ___________________ （发明）．I can’t imagine life without it．

4．They _____________________ （同意） us on some matters yesterday afternoon．

5．Mr. Smith gave us _____________________ （一条） advice on how to keep healthy．