题目内容：

So many students _for the traffic jam ,the exam had to be put off.
A.were late
B.had been late
C.being late
D.been late(选什么,为什么?）

优质解答

选C,非谓语主句the exam had to be put off的主谓是完整 的So many students being late for the traffic jam 用ing表示原因的状语从句,由于主从句的主语不一致,所以从句自己跟上了主语So many students ,如果一致的...