Correct the errors in the following sentence.Margie has worked o

Correct the errors in the following sentence.
Margie has worked on the crossword puzzle all day. All the while, mumbling each clue out loud. I hope she finishes soon.
【正确答案】：Margie has worked on the crossword puzzle all day, all the while, mumbling each clue out loud. I hope she finishes soon.
【题目解析】：p56