at their parents are dead, the poor boy doesn’tknow ________ the money they left.

work with a strong will, we can overcome anydifficulty, _____great it is.

Why do you call him Mr．Knowledgeable— Because he knows almost everything we want to know．

It is difficult to ________ a conversation with someone who only says “Yes” and “No”.

Has Linda come back from Canada? — YesShe ______ there for eight years.