英语一道选择填空题Mr Thompson was busy doing the experiment,only _________英语解答

英语一道选择填空题
Mr Thompson was busy doing the experiment,only ________ once in a while to have a rest.
A to stop B stopping C to have stopped D having stopped

人气：284 ℃　时间：2020-03-19 20:23:35

解答

B 表示伴随,为现在分词在句中做伴随状语.容易错选A,A只有在表示预料之外的结果时才可以,而这里不是.