He was busy doing his homework,only (stopping)once in a whil
He was busy writing a story,only ( stopping ) once in a whil
He was busy writting a story ,only stopping once in a while
一到高中英语选择题She was busy typing a paper,only ( ) once in a whil
he was busy writing a story,olny stopping once in a while to
1.He was busy writing a story,only once in a while to smoke
He was busy writing a story, only ____ once in a while to sm
[-A59] He was busy writing a story ,only ______ once in a wh
非谓语动词 伴随状态He was busy writing a story ,only _____ once in a
19.He was busy writing a story,only _______ once in a while
it was very late,but he was still busy doing his homework的同义
The students were busy doing their homework,only____ once in
He started his own ____when he was only eighteen.(busy)