It worries the couple a lot ______ their only son is behaving worse and worse these days.A．howB．whyC

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• —I regretted what I have done.—_______ gone is gone. ______ no use regretting it any more.[ ]A. What
• _____ in this university that only those who have passed CET4 can graduate. [ ]A. What is required B
• was most important to her, she told me, was her family.[ ]A．It B．ThisC．WhatD．As-高二英语
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• Before a problem can be solved, it must be obvious ________ the problem itself is.[ ]A. whatB. thatC
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• It is uncertain____side effect the medicine will bring about,although about two thousand patients ha
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