I think Tom, as the head of a big department, should either study regularly or______ his job.
Why this excellent newspaper allows such an article to be printed is _______ me.
It is known to all that every minute _____ full use of ______ the lessons will benefit students a great deal.
Actually, _____ works hard can be _____ he wants to be, whether it is a pilot, an engineer or a manager.
It is said that bad living habits as well as dirty surroundings, stuffy rooms and some other factors _____ the wide spread of H1N1.
My parents always remind me to make sure the electricity is turned off while I am having a bath, which would _____ cause danger, leading to a dreadful consequence.