do you know that/if--do you know ( ) we will arrive this afternoo_英语解答

do you know that/if
--do you know ( ) we will arrive this afternoon?
--I am afraid we will be late.
a)that b)if
3kyou

人气：208 ℃　时间：2019-10-02 21:22:16

解答

b.由答句可知问句问的是“是否知道”.而that在句中意思会是“知不知道”