Do you have any idea ______ on earth has happened to our friend?A．thatB．whatC．asD．which-高一英语

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• . Americans eat______vegetables per person today as they did in A．more than twiceB．as twice as manyC
• _____ is no doubt _____ John’s knowledge of first aid saved Ms Slade’s life.A．It; thatB．It; whichC．T
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