Can you finish ____the book in about a week?

Jack, could you help me ________ these pictures on the blackboard? It may help us know more about the hazy weather. (雾霾) — With pleasure.

What are you doing?-I’m cutting the wood _________.[ ]

Sam ______ coins since he was eleven years old, and now he has hundreds of them.

I think she is ________at dancing than singing. –I think so.