—Remember that where and when two different English question words___________. —I see, but can you tell us how to use them, sir?

“You” _____ a very useful word in English.

I know that all  ________getting on well with her.

There  _____  a dictionary and several books on the desk.

We live day by day, but in the great things, the time of days and weeks ____ so small that a day is unimportant.