I don’t know ______ or not the books _____ to the homeless children next month are really useful.

--It’s said that no one ______ light a cigarette at a gas station.

--- Yes. Safety always comes the first.

 In 1800s, a group of adventurers(探险家) ______ on their exploring trip. Five days later, they came to what is now known as Quebec.

__________,we must believe in ourselves and believe that we can do something well.

There is a feeling in me _______ we’ll surely find a cure for Aids.

 Mike is a student at a famous university, _______ for a doctor degree.

Doctors say _____ good diet is of ______ great benefit to our health.

 The farmers are only allowed to cut ______ trees and cut them _______ for firewood once a year.

 It was said ____that was _____ he succeeded in running his business.

 He has no money nor friends here. That’s why he ______ sleep in the street.