what is ----troubles you most from time to time?A it that B that C which D it 为什么选A 而不选D
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whatis----troublesyoumostfromtimetotime?AitthatBthatCwhichDit为什么选A而不选Dwhatis----troublesyoumostfromt
what is ----troubles you most from time to time?A it that B that C which D it 为什么选A 而不选D
what is ----troubles you most from time to time?
A it that B that C which D it 为什么选A 而不选D
what is ----troubles you most from time to time?A it that B that C which D it 为什么选A 而不选D
是一句从句,所以用that引导从句 .
因为后面有主语you所以是一句从句，所以用that引导从句