The subject is a too difficult ___for us schoolgirls to learn.
问题描述：
The subject is a too difficult ___for us schoolgirls to learn.
A.that
B.one.
C.such
D.so
写出解析
答
B.one.
The subject 这个科目,
for us schoolgirls to learn.对于我们这些在上学的女孩子们来说,
( is too difficult ___)
是个太难的一个(科目)了.
显然,这是表语,要加个中心词.指代科目,subject ACD 都不能泛指一个'科目'.所以是B