---Will you please show me how to operate the new machine? ---Sure. It’s a piece of cake. Now let me tell you _____ to do first.
________ it is to visit theme parks in Beijing!
John ________ South Hill. He will be back ________ a few days.
Jim has many hobbies, ________ swimming, hiking and playing badminton.
Mary _______ to see the films because she ________ it twice.
--- Lucy hasn’t come back from the library ________. --- Yes, I have ________ called her.