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an exchange of experience.13. This is a difficult question to answer.9. The first man to fly nonstop across the Atlantic was John Alcock.Ex. 21C1. There are plans to be made at once.13. There is no need for you to start so early.9. We are happy to have you with us this evening.Ex. 21B1. We are reluctant to leave this neighbourhood.13. We were delighted to receive your telegram.9.新編英語語法教程(第6版)第21講 練習(xí)參考答案Ex. 21A1. They would be very surprised to receive…4. This rule is easy to remember.12. I was rude not to answer your letter.20. Her resolution never to marry baffled all offers of love.4. He is not a man to be frightened by the threat of war.12. The way to get into the building is to slip in through the kitchen.20. This is an infectious disease to be wiped out in a few years.4. She was firm in her refusal to accept his offer of marriage.12. My brother was the third person to be interviewed.20. …admit him to be a genius.4. …knew him to be a man of integrity.12. …that it was cruel…20. …the gain in reserves was / has been…28.