My trousers       being washed.What’s worse，this pair of trousers bought yesterday       too short for me.

Lucy, together with her classmates,  ________listening to a talk.

Riding on the swings and playing with the ducks in the pond _____ our children’s greatest pleasures when we took them to the park.

Everyone except Tom and John ________ there when the class began. 

The number of chairs in the room_____ten.I’m afraid a number of chairs in the room____lost.