if only 和on condition that什么区别?

题目

if only 和on condition that什么区别?
比如这道题
-Could I borrow your Longman Dictionary?
-I'd get it for you ______ I could remember who last borrowed it.
A.except that B.if only
C.on condition that D.considering whether
答案加思路,3Q

答案

选c.if only 意思是:要是...就好了,与IF区别非常大.常见用于If only one had an unlimited supply of money!
要是财源不断就好了!
If only it clears up,we'll go.
只要天一放晴,我们就去.
而on contition that==if,意思是如果.如
I'll come on condition that John is invited too.
如果约翰也受到邀请,我就来.
I will go abroad on condition that my husband goes with me.
如果我丈夫能和我一起去,我就出国.