I can think of many cases ()students obviously knew a lot of
I can think of many cases ()students obviously knew a lot of English words and expressions(见下方)
but couldn't write a good essay.
A.why B.which C.as D.where
2003年北京高考题,正确答案选D。请翻译一下句子,并详细解释选D的原因,为什么不选A?