【单选题】The reason why he was late is ______ he got up too late.
【单选题】Why was Tom late for class?
【单选题】He got up very late, ______ he was late for school. [ ]
【单选题】在 BaSO 4 的饱和溶液中加入适量 NaNO 3 ,会使 BaSO 4 在水中溶解度
【单选题】在含有BaSO4沉淀的饱和溶液中,加入足够的KNO3,这时BaSO4的溶解度会( )
【单选题】单项选择。 He ______ up early every morning. But he ______ up late this morning. [ ]
【单选题】The reason ______ he missed the train was ______ got up late.