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1,He was still smilling when the door opened and his wife

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1,He was still smilling when the door opened and his wife
entered in enter
这道题答案是enter,为什么不能用enter in?
2,The goverment is trying to persuade people to ____ money
save economize
这道题为什么不能用economize
save 也有节约的意思?政府试图呼吁大家存钱!
1,He was still smilling when the door opened and his wife
1.enter本身就含有了“come in”的意思.所以再加上in的话就是含义重复了.
2.save money = economize = 节约钱
这道题和第一题有些像,economize也是本身就带有"save money"的意思了,要么用economize什么都不加,要么用save加上money.