He insisted that he ___ nothing wrong and that we _____ to him.   [ ]

A. do; apologise  

B. did; apologised  

C. had done; apologised  

D. had done; apologise

乙醇中重要的杂质检查是杂醇油，其检查是利用

A．杂醇油的臭味

B．杂醇油的挥发性低

C．杂醇油色泽

D．A+C

E．A+B