A good listener takes part in the conversation,offering ideas and ___ questions to keep the talk flowing.

In their efforts to persuade us to buy that product, shopkeepers have made a close study of human nature and have_______ all our little weaknesses.

Mr. Black is an experienced engineer , and he will be employed to        us in improving our equipment .

—Mary told me she would ________ computer studies.—Really? I’ll try my best to ask her to_________ such foolish ideas.

I’ve heard that the wood tower was built more than 1,000 years ago, so I think it is worthy ________．