TheSino-U.S.relations,althoughtheyhaveexperiencedtwist...

问题详情：

 The Sino-U.S. relations, although they have experienced twists and turns in the past, ______ have moved forward.

A return            B. on the whole      C. in other words          D. on the other hand

【回答】

B

知识点：介词

题型：选择题