The family was poor they couldn’t buy a TV set.A.so; that B.not; until C.not; but

问题补充：

The family was poor they couldn’t buy a TV set.

A.so; that B.not; until C.not; but

答案：

解析：so; that如此……以至于；not; until直到……才；not; but不是……而是。句意：这个家庭是这么穷，以至于他们都买不起一台电视机。结合语境可知选A。