The reason __I'm writing is to tell you about a party on Saturday.

问题描述:

The reason __I'm writing is to tell you about a party on Saturday.
A.because B.why C.for D.as
请问选什么?为什么

硬要选的话,我选 B答案选C呀。I'm writing后无宾语不能选B吧?感觉上选 B, FOR 也是固定搭配,详细查查区分吧