选词填空(只填字母代号即可) A. breakthrough B apparent C. territory D. contentment E. adolescence F. crash (1) Taiwan is an inalienable part of Chinese . (2) The company looks poised to make a significant in China. (3) By and by it became that he had acted as my agent. (4) The ups and downs of can be difficult for parents. (5) I cannot describe the feeling of that was with me at that time. (6) I heard a great as the tree fell.