Nobody besides little children thinks that a trip by bus is exciting .
A. besides B. little C. thinks D. exciting

There is a delicate balance of nature which many square miles of ocean and vegetation and clean air are needed to maintain a relatively few human beings.
A. a B. which C. are needed D. a relatively few

The law I am referring requires that everyone who owns a car have accident insurance.
A. referring B. everyone C. owns D. have

"We have won a great victory on our enemy ," the captain said.
A. have won B. a C. on D. enemy

I regret having left the work unfinished ;I should plan everything ahead carefully.
A. having left B. unfinished C. should plan D. ahead