名词性从句中what和which区别
如 After _ seemed half an hour,the teacher gave us the correct answer
A that B what C which D it
怎么选出的B
再如 she is rich,and _ is better still,very beautiful.
A that B what C who D which
又是怎么选出的B
第二句中是主语从句 ,从句中做主语对吧?
可以排除A,C 那么B,C呢?