Chứng minh rằng với mọi n thì phân số $\frac{7n+10}{5n+7}$ là phân số tối giản

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I/ Fill in the blanks with suggested words (Dùng các từ gợi ý để điền đúng vào phần trống của câu): HEAVY - FINGERS - NEW - YOUNG - WEAK - THIN Mr. Hung isn't fat. He's_____. My brother is twenty years old. He's_____. These books aren't old. They're_____. My grandfather is ninety. He's very_____. The bag isn't light. It's_____. There are five_____on each hand. II/ Fill in the blanks with suggested words (Dùng các từ gợi ý để điền đúng vào phần trống của câu): TEETH - FACE - NOSE - HAIR - EYES - EARS - MOUTH - LIPS You use your_____for eating and speaking. She brushes her_____after meals. You can smell something with your_____. My mother has long black_____. She has full_____. Close your_____and go to sleep. Rabbits have long_____. My sister has an oval_____. III/ Make questions of colors, and answer as guided (Đặt câu hỏi về màu sắc và trả lời với các từ gợi ý) Example: her hair / black -> What color is her hair? It's black. Her eyes / brown your sport car / white his shoes / brown this book / yellow his pants / gray our national flag / read and yellow your mother's eyes / black her dress / blue the board / dark green Thu's shirt / white and blue IV/ Fill in the blanks to complete the paragraph, using guided words (Chọn 1 từ đúng để điền vào chỗ trống) Miss Chinh is (an - a - the - 0) singer. She is tall (but - and - so - or) slim. She (have - is - has - are) long black hair and an (round - full - oval - short) face. She has big black eyes, (then - with - about - 0) small nose, full lips and small white (lips - teeth - tongue - chin). She's only twenty-five. She's beautiful and (fat - young - short - heavy). lưu ý: 0 nghĩa là không điền gì vào phần trống.