You' d sound a lot more polite if you make a request ______ a question.
We went through a period_______ communications were very difficult in the countryside.
Professor James will give us a lecture on the Western culture, but when and where _______ yet.
-- I have warned him of the danger but he insisted on going there alone. -- What a _______ boy!
After several months’ voyage, they came to _______ was called the “New World”.
Nowadays some people choose jobs for other reasons _______ money.