题目

What a pity! All his property, the books, the pictures and the house,       consumed by the big fire. A．were    B．was C．had been   D．have been   答案：B  考查主谓一致及时态。此句中all his property为主语，the books, the pictures and the house是property的同位语，所以谓语动词用单数形式。  燃烧等物质的量的有机物A和乙醇，用去等量氧气，乙醇反应后，生成水的量是A的1.5倍，但A反应后生成CO2的量是乙醇的1.5倍，则A是(    ) A.CH3CHO                            B.CH3CH(CH3)OHC.CH2=CHCOOH                   D.CH3CH2COOH