Exercise 5. give the sentences in the plural. example: this book is interesting. — these books are interesting. that is an easy sentence. — those are easy sentences. 1. that car is expensive. 2. this book is old. 3. that house is new.4. this is a fast car. 5. that’s a difficult text. 6. this test is easy. 7. this isan interesting story. 8. this tree is high. 9. that sentence is long. 10. thisgirl is busy.