题目

Nancy let me repeat her instruction _______ sure that I understand what was ______ after she was away on business. A．to make; to do                                            B．making; doing C．to make; to be done                                    D．making; to do 答案：C下列各组混合物能用分液漏斗直接分离的是A．柴油与汽油B．汽油与水C．溴与水D．水与乙醇