Bài 6: Cho tia Ox. Trên tia Ox lấy điểm A và điểm B sao cho OA = 4cm, OB = 6cm. a) Điểm A có nằm giữa hai điểm O và B không? Vì sao? b) Tính độ dài đoạn thẳng AB. Bài 7: Cho đoạn thẳng AB dài 10 cm và một điểm C thuộc đoạn thẳng AB. Biết AC = 5cm. a) Chứng tỏ C là trung điểm của đoạn thẳng AB. b) Gọi D là trung điểm của đoạn thẳng AC.Tính độ dài đoạn thẳng CD. Làm cho em bài 6-7 vs ạ

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các bạn đừng khoanh bậy nha -,- , mình nọp cho cô mấy lần trước sai hết rồi TT -------------- Choose the letter A, B, C or D to complete the sentences Question 1: Some Vietnamese schools make students wear Ao Dai, the __________ dress of Vietnam. A. tradition B. traditional C. traditions D. traditionally Question 2: Can you tell me what is the difference __________ custom and tradition? A. in B. of C. among D. between Question 3: Before beginning the meal, we should __________ for the oldest person to start. A. wait B. to wait C. waiting D. waited Question 4: You don’t have __________ tips for the waiters in Vietnam. A. leave B. leaving C. to leave D. left Question 5: My mother taught me some table __________ when I was young. A. manners B. unities C. prongs D. offsprings Question 6: We reached the house after __________ for almost an hour. A. cycled B. to cycle C. cycling D. cycle Question 7: Our customs are passed __________ from generations to generations. A. down B. up C. to D. over Question 8: Some fortune tellers can read your future by looking __________ your palm. A. to B. in C. at D. for Question 9: I’m so __________ about exploring customs of your country A. excited B. interested C. fond D. keen Question 10: Although I have never been to the place, it has a __________ of belonging to me. A. prong B. palm C. course D. sense Question 11: My teacher paid me a __________ because I finished all difficult tasks. A. cutlery B. compliment C. offspring D. manner Question 12: This filmstrip __________ the daily routines of a typical Vietnamese family. A. reflects B. accepts C. obliges D. sprays Question 13: He __________ try to be more punctual; or else, the manager will get angry. A. must B. should C. need D. may Question 14: He came up with the solution __________ every problems. A. in B. at C. for D. to Question 15: It’s a custom in the USA as people use __________ in all meals. A. cutleries B. offsprings C. belongings D. tips