If only the letter ( ) there in time. A. arrives B. is arriving C.had arrived D.has arrived

题目

If only the letter ( ) there in time. A. arrives B. is arriving C.had arrived D.has arrived
答案C 为什么不选A in time是及时的意思吗?这句话不是说这封信还没送到吗?

答案

if only 引导的虚拟语气,表示对过去的虚拟.要是信能及时送到就好了