7. —Taking in less fat and salt and doing more exercise must

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7. —Taking in less fat and salt and doing more exercise must be a reliable method of keeping fit, _____?
—Of course. Why not try it?
A. mustn’t theyB. mustn’t itC. aren’t theyD. isn’t it
不是两个动作吗?用they
6. —European scientists announced that the speed of light isn’t the speed limit.
—Perhaps it is the biggest challenge to Einstein’s Theory of Relativity. No one _____ any crack in his theory for more than a century.
A. has foundB. foundC. had foundD. would find
为什么不选A. has found
4. —Why didn’t you join in the final of talent shows?
—I _____ , but I was kicked out of the first round.
A. would like toB. wished toC. would D. was to have

7. —Taking in less fat and salt and doing more exercise must be a reliable method of keeping fit, _____?
—Of course. Why not try it?
A. mustn’t theyB. mustn’t itC. aren’t theyD. isn’t it
不是两个动作吗?用they
---arent they
6. —European scientists announced that the speed of light isn’t the speed limit.
—Perhaps it is the biggest challenge to Einstein’s Theory of Relativity. No one _____ any crack in his theory for more than a century.
A. has foundB. foundC. had foundD. would find
为什么不选A. has found
---had found,在European scientists announced 之前
4. —Why didn’t you join in the final of talent shows?
—I _____ , but I was kicked out of the first round.
A. would like toB. wished toC. would D. was to have
－－－
--wished表示现实与愿望相反或不能达成
再问：答案D C D 求解释7. 4
再答：动名词和不定式通常用it 来做形式主语. 所以对应的是is--我想只能这样解释 was to 计划,打算,

7. —Taking in less fat and salt and doing more exercise must —Taking in less fat and salt and doing more exercise must be I am too fat.I must (c.)my diet and exercise more now More and more people nowdays have come---taking exercise eve I need more exercise because I getting____ and _____ (fat) we should exercise more and watch less TV than before. you should eat less meat and take more exercise Eveone must take more exercise and keep______?填什么? We must p___ more food for ourselves and import less. you must drink_____coffee and eat_____vegetables A less/more 关于less and more more and less.