This is ____ that we mustn't waste time A what B because C why D _英语解答

This is ____ that we mustn't waste time A what B because C why D so

人气：498 ℃　时间：2019-08-22 18:21:55

解答

B because
A,D首先可以判断不对 C why这里不能与that 连用可以是This is why we mustn't waste time.