看高考题:Someone called me up in the middle of the night, but they hung up_Icould answer the phone.A.as B.since C.until D.before答案是D。译为:有人半夜打电话,但我还没来得及接(他们)就挂断了。要做好这道题,关键是要掌握before作连词时的几种不同的意 Look at the college entrance examination question: Someone called me up in the middle of the night, but they hung up_Icould answer the phone.A.as B.since C.until D.before the answer is D. Translated as: Someone called in the middle of the night, but I did not have time to pick up (they) and hung up. To do this well, the key is to grasp the different meanings of the before conjunctions.