The students were busy doing their homework,only____ once in a wh_英语解答

The students were busy doing their homework,only____ once in a while to have a rest.
A.to stop B.stopping C.to have stopped D.having stopped

人气：213 ℃　时间：2019-10-26 01:16:54

解答

选B 这是一个非谓语动词的用法,stopping是动词的分词形式表示一个伴随状语,与逻辑主语构成一个主动关系,这题容易错宣城A,因为有个only to do 动词不定式表述一种意外的结果,这里不是
句子的意思是：学生正在忙着做作业,只是偶尔停一下休息一下