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Q9*1KQT-ZU0E#。
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|Byy@0k!O^NXl*v0g3。
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43@UVWAw&-gK。
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R,qA8KhWw^ART^~)*.+。