The classroom is clean it was yesterday.—Sorry, I forgot to clean it.

The airline has a booklet _____ will tell you most of the important information to Europe.

Next week, ____ the students will have a basketball game.

Simon lived in Beijing _____ the years 2002-2004． [ ]

I called you at 7:00 yesterday evening,but no one answered.Sorry,I_______ with my family at that time in the cinema.