I didn’t know ________ they could pass the exam or not．A．why B．wh_英语解答

I didn’t know ________ they could pass the exam or not．
A．why B．when C．that D．whether

人气：187 ℃　时间：2019-08-18 23:26:21

解答

D,我不知道他们是否能通过考试,因为Weather.or not 是一个固定搭配,是否