---How can you use my computer without my permission? ---Oh, I ________to tell you. I hope you don’t mind.

What I want to     to teenagers is that being addicted to the Internet will to some extent do harm to both mental and physical health．

 He ________ to paint the whole house early this morning, but has only finished the front part of it so far.

Joan saw her boyfriend off at the railway station. She waved until the train was  _____.

After he graduated from college, he _______ his father’s business.