Do you mind my smoking here—________. Look at the sign. It says, “No smoking.”

Of the three boys, John sang _______.

He used ________ on the right in China, but he soonwas used ________ on the left in England.

Who did the teacher, as well as the monitor, ____ an article for the wall newspaper?

Mary recommended me _______ an English dictionary,which I thought would be of great help.