書名：命題老師最愛考的英文文法
版本：
頁數：p.287 EXERCISE 01
題目：
While eating her breakfast, Maria called her friends.
將省略的副詞子句還原
疑問：這題還原完的答案是：
While she was eating her breakfast, Maria called her friends.
我很好奇不能還原成這樣嗎：
While she ate her breakfast, Maria called her friends.
不知道這問題會不會太簡單，但是小弟想了很久想不通，所以上來發問，
希望有高手可以幫忙回答，謝謝。