新概念一课后习题144课

liuqing

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.

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