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 SD Exercises
1 is 2 is 3 are 4 Is
5 have
Key to Multiple choice questions
1 b 2 c 3 c 4 c
5 a 6 b 7 c 8 b
9 a 10 d 11 d 12 d
Key to Sentence structure
Divers, who often have to work in darkness a hundred feet under
water, have been frightened out of their wits by giant fish bumping
into them as they work.



祝同学学习进步~