单选题 The only thing ______ I knew is ______ my brother said to me the other day.
A. which ; what B. that ; what C. what ; that D. that; which

【正确答案】 B
【答案解析】该题考查定语从句和表语从句的引导词。分析句子结构第一个需要填的是定语从句的关系词,第二个需要填的是表语从句引导词。第一个空格前面是the only thing,先行词有。only修饰,关系词必须用that。类似的词还有:all,everything,something,nothing,first,last,few,much,any, no以及形容最高级级等。后面一个空格根据意思判断应该用what,所以B项是正确答案。