同学你好，该知识点来自沪江网校《英语零基础直达大学六级【开学季特惠班】》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
Possible answers
A 1 She happened to mention that it is your birthday today.
2 It happened that I was abroad when I heard the news.
3 Tell me what happened.
4 If you happen to see Maggie, please ask her to phone me.
B 1 Some hotels are more than thirty storeys high.
2 Children love hearing stories from their parents.
3 A church or a temple is a place of worship.
4 Many warships were sunk in World War Ⅱ.

Key to Multiple choice questions
1 d 2 d 3 a 4 d 5 b 6 c
7 b 8 b 9 a 10 d 11 b 12 b

祝同学学习进步~