重点讲解：
1. next to 紧靠…旁边；在…近旁；贴近；
例句：They asked us to pair up with the person next to us and form teams.
他们让我们与身边的人配对组成小组yZEI3~yF[&AexuB^Q2Sr。
2. used to do sth. 过去常常；过去曾；
例句：Japanese sportsmen used to be strong in the long distance running, and now the Korean athletes are making progress too.
日本运动员过去一直在长跑中表现突出，现在韩国运动员也追上来了pqIs4IOm)MVP。
3. sign up (和…)签约；雇用；报名(参加课程)；
例句：If you want to come in on the project, you must sign up immediately.
如果你想参加这个项目，你必须尽快报名jR*RdYEN+]。
4. wake up 醒；醒来；唤醒；弄醒；
例句：A lot of people wake up every day with a sense of being unsettled and disturbed.
很多人每天起床的时候都感到无法集中精力、心烦意乱vWNwv=SUlg3pYQMOjnjq。