题干
Our team tried our best, ________ we failed the match at last.
A：but
B：and
C： or
D：while
答案(点此获取答案解析）
A
Our team tried our best, ________ we failed the match at last.
A：but
B：and
C： or
D：while
所表示的轨迹是焦点在（ ）