ex5 . đánh dấu vào các câu đúng và sửa các câu sai
1. he studied so badly that he couldn't pass the exam
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2. it is very cold . we can't bathe
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3. would you be very kind and answer this letter by return
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4. the story was very funny . we couldn't stop laughing
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5. the floor wasn't strong . we couldn't dance on it
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6. there were so many exercises that I couldn't finish them in a short time
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7. he spoke so fast that we couldn't understand him
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8. the restaurant is so expensive that we can't eat in that restaurant
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9. the price of the house is very high . we can't buy it
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10 . I am very unhappy so I cannot go out with him
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11 . they sang very well I could invite them to the party
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12 . you are very young. you can't have a front - door key
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13. I am rather old . I can't wear that kind of hat
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14. the ladder wasn't very long . It didn't reach the window
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15. he hadn't much money . he couldn't live on it
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16. he was furious . he couldn't speak
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