Dust ________ in a room if we do not clean the room regularly.
The sentence,which puzzled John,was also me and we had to turn to our English teacher for help.
Telephone users sometimes complain about unreliable service and they consider unfair charges.
I really appreciate to drive me home,but I am afraid that I have to finish my work first now.
Many people like to talk about generation gaps. I don’t think there is in my family, though.
The drilling in Antarctica dragged on slowly because of lack of money, equipment breakdowns, environmental ______ and severe cold.