题目

My father isn't here now. He ___Shanghai. He ___ there twice.  A. has gone; has been    B. has gone to; has been to  C. has been to; has gone D. has gone to; has been 答案：D（2012?牡丹江）化学物质与人体健康密切相关，下列做法有利于健康的是（　　）A．B．C．D．