分类：教育/科学-外语学习-英语考试
问题：一道英语选择题Accordingtosomeeducators, 
dingtosomeeducators,thegoalofteachingistohelpstudentslearnwhat() eyneedeyneedeyareneededtheymayneed这道题的正确答案是B,我却选的是C。那C错在哪里了?
回答：听我说````
learn是一个动词，动词后面应该跟宾语，宾语可以是名词或者是相当于名词的名词性从句，而what =sth that  因此what they need =sth that they need to know，sth that they need to know 是一个以sth为先行词的定语从句，sth是know 的宾语，这样一来便语法上通了
如果选they are needed 就成了被动语态了，意思显然不对，不能说 他们被需要```如果想表达他们需要sth，也应该是they need sth 不能是they are needed sth，况且need是及物动词，后面得跟sth