from below the river(从河的下游) from under the desk(从桌子底下) from behind the curtain(从幕后) from among the crowd(从人群中) till after examination(到考试后) from behind the tr...
请看下面两句:To get tickets, you have to book in advance. 你若想弄到票,你必须要提前预订。To get into university you have to pass a number of examinations. 你如果想进入大学学习,你必须通过一系列...