题目

—Have you ever been to Xiamen? —Yes. I _____ there in 2013. A. go                                        B. went                                    C. have gone 答案：B下列物质的类别与所含官能团都正确的是（ ）   A．酚类 –OHB．羧酸　 –CHOC．醛类　–CHOD．CH3-O-CH3醚类