Man differs from beasts ______ the former is able to think, while the latter aren’t.

–Will you go to the exhibition tomorrow?
---Yes. I will go ____it’s windy.

.I am here not because I want to earn money ________I want to educate the children.

There are many other ways to advertise _______ broadcast advertisements on radio and TV.

.I don’t like the way ______ he talks; he is so rude.

_______ you have masses of work to do, you don’t have to help me with the housework. 

It still puzzles today’s scientists ______ some mammals produce their young ______ others lay eggs to produce their offspring( 后代)

The question came up at the meeting _____ we had not enough money to do the research.

_____ he thought he was helping us with the work , he was actually in the way.

______ they live in the same house, we would no trouble finding them.
---But as traveling salesmen as well as seasonal herdsmen and farmhands, as you know, they move house _______ many of the Americans who live on wheels.