if only the letter__there in time.a arrive b is arriving c had ar_其他解答

if only the letter__there in time.
a arrive b is arriving c had arrived d has arrived

人气：214 ℃　时间：2019-11-04 14:16:56

解答

选C, if only后面用过去式虚拟语气,即用过去的一系列时态表示与事实情况的相反.