用whether还是that

问题描述:

用whether还是that
---Do you know we`ll get here at 3:00 this afternoon?
---I`m afraid we`ll be late.
A.that B.how C.why D.whether

翻译过来你就清楚了:
---你知道我们要下午3点到那里的吧?
---我看恐怕要迟到了.
所以,不能问是否,不用whether
用that.宾语从句.