Question

______ a man knows what is not to be done, will he succeed in doing what is to be done.

A．What if

B．If only

C．As if

D．Only if

Answer 1

D

考查倒裝句。Only放在句首并強調(diào)狀語時，使用部分倒裝句。本題only 放在了句首，且if a man knows what is not to be done是一個條件狀語從句，所以選D；句意：只有當(dāng)一個人知道了不應(yīng)該做的事情，他才能成功地做應(yīng)該被做的事情。