Where is my computer game?—It’s _____TV set. [ ]

Thank you for the trouble you have ____ to help me.

“Well done, John! Not a single mistake ________ in your exam paper this time!” said the teacher．

Mr. Li said he would show the students _____ New York City, which is famous _____ the world. [ ]

Will you put up my picture ______ the wall, please?[ ]