II.Choose A,B,C or D for each blank in the following sentences 1. In the past ,……………. did the Colo people use to cook rice and other foods ? A. how B. why C.which D. what 2. In a Tay’s family ,………… has right to decide the marriage of the children ? A.who B.when C. whom D. how 3. ………….have the Nung preserved their various sources of folk arts and traditional activities for ? A.Why B.How long C.What D. How 4. ………….does the Hug King Temple Festival take place ? 5. A.Where B.Which C.How often D.Both A and C 6. …………….. is the Gong Festival held in special occasions by some ethnic groups in Vietnam? A. Why B.Where C.How often D.When.

Thề là tao 15 năm ngu hoá, ko hiểu lớp 9 t qua đc môn tự nhiên kiểu j trong khi t ngu cả sinh lẫn lý :v ảo thật đấy :")))

II. Choose the best answer to fill in the blank. 6. If we go ___________ , littering, the environment will become seriously polluted. A.to B. on C.out D. off 7. She rarely goes to work late, ____________ ? A.isn’t she B. does she C.is she D. doesn’t she 8. Hoa: I suggest taking showers instead of baths to save energy. - Lan: ______________________. A. That's a good idea B. OK. I don't want to C. Great ! Don't do that D. Well done! 9. Henry’s mother has just gone abroad. _________ , he has to look after himself. A. Therefore B. so C. However D. Moreover 10. ……… by the sea, the country has the advantages of having a large coastal area. A. Situating B. Stood C. Locating D. Located 11. Bill Gates, ______ is known as the king of computer programmes, is famous for his charitable work. A. that B. who C. which D. whose 12. Louis is virtually bilingual______Dutch and German. A.on B. in C. for D. with 13. Television is an _________ means of communication. A. natural B. alternative C. ineffective D. effective 14. Tom suggested _________ to eat. A. go out B. going out C. to going out D. going on 15. Nam is a __________ cyclist. He often has accidents. A. carefully B. carelessly C. careful D. careless

Tìm tất cả số nguyên n : A) n mũ 3 -n mũ 2 +2n +7 chia hết cho n mũ 2 - 1 B) n mũ 3 +2n mũ 2 -3n +2 chia hết cho n mũ 2 -n

Giúp tui với mn oiiii Xét tính chẵn lẻ của y=Tanx+1/sinx ⇒ Giải thích chi tiết

Em nghỉ lâu quá nên quên giúp em vs ạ.

Viết 1 đoạn văn từ 9-12 câu làm nổi bật tâm trạng của nhân vật tôi trong ngày đầu tiên đến trường. (ko chép trên mạng)

Trong mặt phẳng tọa độ `Oxy` cho `A(2,-3)` và `d:x+2y-4=0` và `(C):(x+1)^2+(y-3)^2=16`. Tìm ảnh của `A ,d, (C)` qua phép quay tâm `O` , góc quay `-90` độ

Giúp mik với mọi người ơi, cần gấp lắm ạ

giúp mình bài này nha xin cảm ơn , cần gấp