With dinner_____,the lady went on_____ some sewing.

题目

With dinner_____,the lady went on_____ some sewing.
A.to prepare; to do B.preparing; doing
C.prepared; to do D.to be prepared; doing
正确答案为c,d为什么不对?

答案

准备好晚饭后,这位女士继续做针线活
又先后顺序,完成了 做饭,d 不定时有将来的意思