题目

 With everything she needed _____, Mrs Green left the supermarket and took a taxi home.    A. buying                 B. to be bought    C. bought          D. to buy 答案： C。本题考查“(with)＋名词 / 代词＋非谓语动词”结构。she needed作定语，修饰everything。句意：所需要的都买好后，格林夫人离开超市打的回家了。下列气体能用氢氧化钠作干燥剂的是（　　）? A、CO2B、HCl C、SO2D、O2