2._____,tears ran down her cheeks.A Seeing B.While singing C.As she sang D.When sang选cB为什么不可以呢?

2._____,tears ran down her cheeks.A Seeing B.While singing C.As she sang D.When sang选cB为什么不可以呢?
2._____,tears ran down her cheeks.
A Seeing B.While singing C.As she sang D.When sang
选c
B为什么不可以呢?

2._____,tears ran down her cheeks.A Seeing B.While singing C.As she sang D.When sang选cB为什么不可以呢?
主句的主语为tears
如果选B,那么从句补充完整就是while tears are singing了
省略的话,要主句和从句的主语一致

因为，从句和主句的主语不一致

这里考察的 就是主句和状语的主语一致性的问题 主句的主语是tears ，所以不能选b