If you don't know () it takes to start a business,you'll surely fail
问题描述:
If you don't know () it takes to start a business,you'll surely fail
A.how B.what C.which D.where
正确答案为B,我不懂,想知道原因.
答
宾语从句中的谓语takes"需要"缺宾语,故用what