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】》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~

答案如下：


A
1 The writer lives in a very old town which is surrounded by beautiful
woods.
2 Because it is a famous beauty spot.
3 Visitors have been asked to keep the woods clean and tidy.
4 Litter baskets have been placed under the trees.
5 The writer went for a walk in the woods.
6 Yes, he saw a lot of rubbish.
7 He saw a sign among the rubbish.
8 The sign said, ‘Anyone who leaves litter in these woods will be
prosecuted.’

B
1 Someone has aired it. It has already been aired.
2 Someone has cleaned them. They have already been cleaned.
3 Someone has emptied it. It has already been emptied.
4 Someone has sharpened it. It has already been sharpened.
5 Someone has turned them on. They have already been turned on.
6 Someone has bought them. They have already been bought.
7 Someone has swept it. It has already been swept.
8 Someone has taken them to school. They have already been taken to school.
9 Someone has invited them. They have already been invited.
10 Someone has told them. They have already been told.

C
1 It hasn't been aired yet. It will be aired tomorrow.
2 They haven't been cleaned yet. They will be cleaned tomorrow.
3 It hasn't been emptied yet. It will be emptied tomorrow.
4 It hasn't been sharpened yet. It will be sharpened tomorrow.
5 They haven't been turned on yet. They will be turned on tomorrow.
6 They haven't been watered yet. They will be watered tomorrow.
7 It hasn't been repaired yet. It will be repaired tomorrow.
8 It hasn't been dusted yet. It will be dusted tomorrow.
9 They haven't been corrected yet. They will be corrected tomorrow.
10 It hasn't been shut yet. It will be shut tomorrow.

祝同学学习进步~