题目

小麦的叶肉细胞通过光合作用合成葡萄糖，组成葡萄糖的碳、氢和氧三种元素分别来自 A．、和                  B．、和 C．、和                  D．、和 答案：B  He insisted on staying _________ back home. A．rather than going B．rather than go C．than going D．rather than to go