He __________ be at home now because I saw him in the office just now.

____ I fill in the application form right now, sir? No, you needn’t. You can complete it this afternoon.

All of us must do_______ to help protect the environment，or we will have more hazy weather雾霾天气.                                    

— Wow! You look different! You            wear glasses.— Yes, I did. But now I am wearing contact lenses(隐形眼镜).

According to the school rules, if a student _________ happen to damage something by accident,he/she should report it to a teacher or the office immediately.