He slept well______all the windows open.A.when B.with C.while D.because 要原因

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He slept well______all the windows open.A.when B.with C.while D.because 要原因
He slept well______all the windows open.A.when B.with C.while D.because 要原因

He slept well______all the windows open.A.when B.with C.while D.because 要原因
with

c while 表示转折