题目

 ---Where is the manager? I have something important to discuss with him.  --- He is at the airport now. He _________ for Beijing.   A. has left            B. leaves          C. left            D. is leaving 答案：D据1887年牛庄口海关的报告，每包重300斤的洋纱，卖价为57两白银，而同样重量的一包土纱，卖价却在87两左右。据此可知，当时A.中国土纱的竞争力弱于洋纱B.西方工业品在中国非常畅销C.中国传统经济仍在持续发展D.中国经济结构向多元化发展