单选题 It is considerate of you to turn down the radio ______ your sister is still ill in bed.
【正确答案】 A
【答案解析】[解析] 本题考查连词词义辨析。while意为“当…的时候”;so意为“所以,因此”;how意为“如何,怎样”;that用来引导名词性从句。根据句意,应选A。