【题目】It is important that parents know of any situation ________ can be of great significance to their children’s behavior and school performance.
A.whichB.where it
C.whatD.that
在线课程【答案】D
【解析】
考查关系代词。句意：重要的是，家长应该知道任何对孩子的行为和在校表现有重大意义的情况。分析句子可知，situation为先行词，且被any修饰，在后面的限制性定语从句中作主语，所以关系代词只能为that。故选D项。