ĐỀ BÀI: Hình thang có trung bình cộng 2 đáy 18 cm. diện tích là 54 cm2. Vậy chiều cao của hình thang là?

Đề bài: Write the sentences in the negative.

1. I went to the cinema yesterday.

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2. John read a comics book yesterday afternoon.
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3. My friends came to my house last weekend.
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4. You bought a new CD yesterday.
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5. I swam in the sea last summer.
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6. Emma told me a joke yesterday.
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7. The cat ate a fish last night.
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8. You and Jim made sandwiches for lunch yesterday.
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9. Dad drove to work yesterday morning.
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10. Our parents sent us an email last week.
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11. They did a lot of homework yesterday.
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12. I saw many people on the stress yesterday morning.
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13. I had breakfast at 9 o’clock last Sunday.