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-听说升级版【暑期班】》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~
因为版权原因，网校无法为同学提供课后题答案了，同学可以在网上搜搜新概念教师用书（内含答案）。
做题过程中如果有不懂的问题可以随时在答疑区提问的。

Key to KS Exercises
A
1 I have just had breakfast.
2 He has been in prison for six months.
3 The police have not caught the thief yet.
4 You have (already) asked that question three times
(already).
5 Have you ever been to Switzerland?
6 I have never been to Switzerland.
7 He is a wonderful runner. He has broken two records so far.
8 I haven't seen George lately.
C
1 He has just left the house.
2 He has just had breakfast.
3 She has just written a letter.
4 My sister has just turned on the radio.
5 My mother has just made the bed.
6 She has just bought a new hat.
D
1 He hasn't washed the dishes yet.
2 She hasn't made the beds yet.
3 He hasn't combed his hair yet.
4 She hasn't swept the carpet yet.
5 We haven't read ‘Macbeth’ yet.
E
1 Have you seen the new play at‘The Glob’ yet?
2 Have you taken your holidays yet?
3 Have you read this book yet?
4 Have you done your homework yet?
5 Have you finished your work yet?
Key to SD Exercises
1 received 2 received
3 took 4 taken
5 take

祝同学学习进步~