the

You don’t know about the difficulty I had ______ the work then at all.

In the modern technological world the sea offers many ______ to help mankind survive.

The engineer is not happy with the project, and　　　　is her boss.

--What do you suppose made the mother so worried?       --__________.

—You can see Mr. Smith if there is a sign“_____”on the  door of his shop.—Thanks.

_____he read the book, _____he got in it.

--Do you think the football players played very well last night?   -- __________.

─Do you know the woman over there?─Yes, She's_______ aunt?

_____ fashion differs from country to country may reflect the cultural differences from one aspect.

____the best way to travel on Bastille Day?