—Jack, could you help me______ when the plane will take off on the Internet?
—I’m sorry, my computer doesn’t work.

Li Na, a world-famous tennis player from Wuhan, never _______her dream; She has just set a new record in the 2011 French Open.

“Don't______ to strangers on your way to and from school”, mother often______ to me.

You are ill. You had better _______ the doctor right now.

--- Do you take exercise every day?
----Yes. I always______ thirty minutes after supper.

Mrs. Green is ________ her purse, but she can’t __________ it.