同学你好，该知识点来自沪江网校《新概念英语2、3、4册连读【双11专享班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
Key to KS Exercises
A What has happened：has been grown (1. 3); has begun (1. 6);
have just finished (1. 7); has won (1. 13)
What has been happening：have been expecting (1. 5); has been
working (11. 8-9); has been helping (1. 10)
Key to SD Exercises
1 among 3 manager 5 usual 7 between
2 usual 4 headmaster 6 director 8 usually
Key to Multiple choice questions
1 d 2 b 3 d 4 a
5 a 6 b 7 b 8 a
9 c 10 b 11 d 12 d

祝同学学习进步~