Учебник. Unit 3. Step 6. Exercise 5

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This device is difficult to improve
A sandcastle is easy to destroy
Chinese is hard to learn
New tools are interesting to invent
This water is not safe to drink
That football match was exciting to watch
His plan was difficult to follow
My friend’s cottage was easy to find
A five-star hotel was hard to find on the coast
His words were impossible to believe.
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