Make the following sentences plural This is a watermlon. it is a yellow shirt. that's my watch.

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• 1. Change the following sentences to plural 1.He is a hard-working employee.she is a hard-working employee,too 2.I am a nurse.My friend is a nurse,too 3.she is a taxi driver.he is a taxi driver,too 4.i an a smart student,my friend is a smart student,too
• 2. Give me five plural sentences
• 3. Change these sentences into simple and plural ones 1.These are my parents. ______ _______ _______ my____ 2.That boy is my sister‘s friend _______________ _________ are my sister's friend
• 4. The discovery and origin of mathematical knowledge To be brief, no more than 50 words 2. What kind of diseases are easily caused by insufficient oxygen and dirty air A. Respiratory system B, blood circulation system C, digestive system D, nervous system 3. Brazil and Australia are in the forefront of the world in terms of mineral resources, reserves and production
• 5. The origin of mathematical knowledge Mathematics, like other branches of science, is a kind of intellectual accumulation developed through human social practice and production activities under certain social conditions. Its main content reflects the quantitative relationship and spatial form of the real world, as well as the relationship and structure between them. This can be confirmed from the origin of mathematics The Nile River in ancient Africa, the Tigris River and Euphrates River in Western Asia, the Indus River and Ganges River in central and South Asia, and the Yellow River and Yangtze River in East Asia were the birthplaces of mathematics. Because of the need of agricultural production, the ancestors of these areas used to control floods and irrigation, measure the area of fields, calculate the volume of warehouses, calculate calendars suitable for agricultural production, and calculate related wealth We have accumulated rich experience in long-term practice, such as calculation, product exchange and so on, and gradually formed corresponding technical knowledge and related mathematical knowledge
• 6. The origin of mathematical knowledge is less than 50 words
• 7. The discovery and origin of mathematical knowledge, and make a brief introduction and elaboration
• 8. Let | Z | denote the distance from the point corresponding to complex Z in the plane to the origin. Given | Z | = 2 + z-4i, find complex Z
• 9. The distance from the corresponding point of complex number 1 + 1I in the complex plane to the origin is () A. 12B. 22C. 1D. 2
• 10. In the complex plane, the distance from the point corresponding to the complex number 1 + 2I to the origin
• 11. He's a policeman
• 12. Complete the following sentences as required, with one word left blank 1. We of talk about news when we have breakfast We often talk about news_____ _____ . 2. Don't phone me when you are driving a car Don’t_____ _____ _____ _____ me when you are driving a car 3. They all rnjoy watching TV plays What ______ they all _______ ________ ? 4、He returns to his hometown as soon as he has no money? _____ he _____ to his hometown as soon as he has no money? 5. He is gone and you can go on with your story He is gone and you can ______ _______ your story According to the Chinese prompt, complete the sentence, each empty word. I've never failed the same exam. My deskmate never ______ ______ ______
• 13. Complete every word in the sentence Mary was so nervous that she didn't and t do well the exam Mary was ____ ____ ____ ____ well in the exam. I went to (the computer club) yesterday after noon _____ ____ _____ you ______ yesterday afternoon?  
• 14. Complete each empty word in the sentence Every July, our city gathers thousands of tourists from all over the world There are _____ of _____ from all over the world in our city every year. It's helpful to bring a shopping list when you go shopping It's very _____ to take a _____ list with you when you buy something. You are welcome —Thank you for your help.—_____ _____ . If meng0902 and AEE_ The last question is two blanks
• 15. First grade English complete sentences, each empty word Xiao Ming is going to review his lessons for the exam Xiaoming is going to ______ ______ his test. How about a picnic this weekend? ______ ______ having a picnic this weekend? What are you going to do tonight? _____ are you ______ to do tonight? I plan to make a plan for my study on Monday morning I am going to _____ ______ ______ for my study on Monday morning.
• 16. Rewrite the sentences as required, one word for each blank These books are (fifth yuan) _________ ___________ ___________ these books? My sweeter is (thirty yuan) _________ ____________ _________ your sweater? I like (blue) __________ ____________ do you like? Mrs Smith wants a black skirt _________ Mrs Smith __________ a black skirt? --How much are the shorts --____________ _____________ 30 yuan.
• 17. What's the difference between simple sentences and complex sentences? Give a few examples ~ ~ it's better to talk about the method of simple discrimination~~ It's better to write it yourself~~
• 18. How to change complex sentences into simple sentences
• 19. Change the following single sentence into a complex one We must unswervingly adhere to the principle of self-reliance, striving for foreign aid, learning and introducing foreign advanced technology, and developing China's socialist economic construction
• 20. Change a complex sentence into a single sentence When the sun rises, it shakes off its glittering clothes, blows the breeze, drives away the night and dispels the silence When the sun rises, it shakes off its glittering clothes, driving away the night and dispelling the silence.