Boys and girls, this is Mary Smith. You can call her _______.A. Mr. Smith B.Mrs. Mary C. Ms. Smith
Jane is high school student in the United States.
Tom studies _______. He _______plays with his friends.
—do you exercise? —Hardly ever.
I have ____________ homework to do and I’m _______ tired now.
The problem is _________ difficult ________ students can solve them.