汉译英：1我们成功地克服了所有困难.2我正要上床睡觉,这时有人敲门.3自从他离开以来,我一直在北京...

1we had already overcome all of the difficulties。2some knocked the door when i was going to the bed。3since he came here, i was at Beijing always。4she is a nice girl, we all love her so much。