1. 用所给词的适当形式填空

1. （1） He has been in good condition since he stopped (eat) fast food．
3. （2） How long have you (have)your mobile phone?
5. （3） (not open)the window，please．It's too cold．
7. （4） We (know)each other for about twenty years．
9. （5）   (be)honest is the first thing people should learn．