It was three years ago Mr. Smith came to Shanghai A. when B. since C. that D. until——青夏教育精英家教网—

摘要： It was three years ago Mr. Smith came to Shanghai A. when B. since C. that D. until

网址：http://m.1010jiajiao.com/timu3_id_2372603[举报]

It was three years ago ________ Mr．Smith came to Shanghai．