1. Tính nhanh: a, 1/2 + 1/4 + 1/8 + 1/16 + 1/32 + 1/64 + 1/128 + 1/256 b, 1/3 + 1/9 + 1/27 + 1/81 + 1/243 + 1/729 c, 1 + 5/4 + 5/8 + 5/16 + 5/32 + 5/64 Cần giải ra đầy đủ, dễ hiểu ạ

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Finish each of the following sentences in such a way that it means exactly the same. (20 pts) 1. She doesn’t get up late anymore → She used……………………………………………………………………………………………………………. 2. They started learning English four years ago. → They have …………………………………………………………………………………………………………. 3. She is a far more serious student now than she used to be. → She studies ………………………………………………………………………………………………………… 4. I’d like you to help me to put the chairs away. → Do you mind…………………………………………………………………………………………………….. 5. I’ll do anything for you because I love you. → I’ll do anything for you because of …………………………………………………………………….. 6. He will come because he wants to be sure of meeting you. → He will come so………………………………………………………………………………………………… 7. Your hair needs combing properly. → Your hair………………………………………………………………………………………………………… 8. “Would you mind not smoking in here?” I’d rather …………………………………………………………………………………………………………… 9. He wrote the letter in two hours. → It took …………………………………………………………………………………………………………….. 10. “Why don’t we go out for a walk?” → My father suggested ………………………………………………………………………………………….