单选题 The teacher tried to explain the problem, but the explanation did not ______.
【正确答案】 C
【答案解析】[解析] 动词词组辨析。come up“走近；发生”；hang on“坚持下去；不挂断；握住不放”；get across“被理解，被接受”；look out“注意；当心”。根据句意和搭配，只有get across能与the explanation(解释)搭配。故答案为C。