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Tứ giác ABCD có M, N lần lượt là trung điểm của các đường chéo AC và BD. Gọi G là trọng tâm tam giác ABC. Nối GC cắt MN tại O. CM : OC=3OG Bài làm thế nào ạ mai 7h mik nộp rồi ạ
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Exercise 4: Complete the sentences with one preposition in each gap. 1. Jordan bought a fantastic denim jacket for twenty euros, but he shopped………. for hours before he found it. 2. It wasn’t a good idea to buy those jeans without trying them …………. first – they’re too small! 3. I got this T-shirt for you. If you don’t like the colour, you can take it………... and change it for a different one. 4. Dad’s buying lots of pairs of socks! Why? He’s stocking ……….. on them, ready for winter! 5. We went to get some more of those cheap jeans but they’ve sold …………… so there were none left. 6. How long do you think it will take you to save …...…... for those boots? 7. I’m going to have to choose between the shoes and the jeans – I haven’t got enough money to pay …………. them both! Giúp với mình cần gấp ạ ;-;

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