I’m sorry, _________ I won’t be able to come tonight

Allen had to call a taxi because the box was ____ to carry all the way home.

Can you tell me ______ that he came to life?

Good teachers are usually __________ in their students.

You’re coughing badly, Martin．Why not give up smoking?—- Give up smoking? Easier said than done, Amy．Once you _____ the habit of smoking, it is very hard for you to______．