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Tính số phần tử và tổng của các tập hợp: `A = {2 ; 5 ; 8 ; ... ; 1004}` `B = {-1 ; 0 ; 1 ; ... ; 39 ; 40}` Help me
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Các câu hỏi liên quan

I. Complete the following sentences , using Neither /Either / So or Too . 1. We didn't get on the bus and I ... 2. She is always busy on Sundays and I ... 3. They missed the bus and I ... 4. Mai doesn't work hard and I ... 5. I bought a new house in the city and she ... 6. They watch news on TV every morning and I ... 7. Quang walks to school every day and I ... 8. They are workers and I ... 9. My parents don't like fish and I ... 10. She is writing a letter and ... II. Fill in each blank with Little , a few , a little or few . 1. Can I have ... milk in my coffee ? 2. I'm going to the movies with ... friends tonight . 3. I drink very ... coffee . I don't like it. 4. How long are you going tostay ? - For ... days ago . 5. I'm going out for a walk . I need ... fresh air . 6. There is ... food in the fridge . It was nearly empty . 7. It's not easy to find a place to stay in this town . There are very ... hotels . 8. I'm writing ... letters to my family and friends . 9. Give the roses ... water every day . 10. I only need ... minutes to get ready . 11. In the surnmerthe weather is very dry . There is very ... rain . 12. The exercises are very difficult , but ... students can do them .

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