giúp em bài 3 đi ạ em cần gấp cảm ơn mọi người nhiều <3

Đề bài: Chứng minh rằng các biểu thức sau có giá trị dương với mọi giá trị của x (MONG MNG GIÚP.CẢM ƠN MNG NHIỀU)

Thầy, cô giáo giùm em được không?

Giúp mình với , mình cần gấp lắm

1. He can do the exercise quickly……………………………………………… 2. We must finish this test right now ……………………………………. 3. They have to draw their picture themselves…………………………………… 4. The people are going to build a road here…………………………………. 5. She should complete the passage………………………………………….. 6. All we might understand this problem…………………………………………………. 7. The people ought to stop making war in the world……………………………………… 8. She may answer the question easily …………………………………………………. giúp em zới ạ

III. Chia các động từ trong ngoặc ở thì QKĐ/HTHT 1) We (study).....................................a very hard lesson the day before yesterday. 2) We (study)...........................................almost every lesson in this book so far. 3) We (never watch)..................................................that television program. 4) We (watch)...................................an interesting program on television last night. 5) My wife and I........................................(travel) by air many times in the past. 6) My wife and I (travel).................................. to Mexico by air last summer. 7) I (read)......................................that novel by Hemingway sevaral times before. 8) I (read)..........................................that novel again during my last vacation. 9) I (had)......................................................a little trouble with my car last week. 10) However, I (have).......................................... no trouble with my car since then. 11) I (have ) ………….....................................……..this toy since my birthday. 12) We (live )…………................……….in HN for ten years now and like it a lot. 13) The last time I (go) ……..............………………to HN was in May 14) When my parents were on holiday I ( stay)……..................… with my aunt for a week 15) I (not see ) my son for ages .He (not visit ) …….....…………..me since May 16) Tom ( be) …….............……….to HN twice .He loves it very much 17) My sister (work ) .............................…for an enterprise for two years .That was after college 18) I (move)………… to HN in 2001. I (be ) ….......……….there a long time now. 19) It was so cold today that I (wear)…...................………… a sweater at school. 20) So far this month there (be )……..................……. three robberies in this street. 21) When I was young I (meet )……..........................……..him three times. 22) In the past few years ,it (become )……..............…….. more and more difficult to get into university. 23) I (feel )………….........……better since I ( live) ……...............………….here. 24) Since I (be ) ……………………in this city I ( not see)… ………… him. IV. Khoanh tròn đáp án đúng 1. When ____________ the school? A) have you joined B) did you joined C) did you join D) have you ever joined 2. _____________ in England? A) Did you ever worked B) Have you ever worked C) Worked you D) Didn't you have worked 3. That's the best speech _________ B) I never heard B) I didn't hear C) I used to hear D) I've ever heard 4. He's the most difficult housemate _____________________ A) I never dealt with. B) I never had to deal with. C) I've ever had to deal with. D) I've never had to deal with 5. ______ to him last week. A) I spoke B) I've already spoken C) I didn't spoke D) I speaked 6. _____a contract last year and it is still valid. A) We have signed B) We signed C) We haven't signed D) We have sign 7. ______ from a business trip to France. A) I come back B) I came back C) I never came back D) I've just come back 8. Prices ________ in 1995 but then _____ in 1996. A) rised _ falled B) rose _ fell C) have risen _ have fallen D) rose _ have fallen 9. You ____________ to a word ____________ A) listened _ I haven't said B) didn't listen _ I say C) listened _ saying D) haven't listened _ I've said back 10. I can't believe that ________________ the news. A) you haven't read B) you didn't read C) you don't read D) you read not.

1. A. castle B. whistle C. hostel D.listen (TGC: t) 2. change B. hungry C. angry D. single (TGC: n) Nhanh = HN

Vẽ vịt tấu hài các thứ Nl: Vịt vịt vịt ..... Vịt ở khắp mọi nơi

1. Someone has already sold the chair…………………….………………………… 2. They have built the bridge since 2000…………………………………………………… 3. She has made the cake for 2 hours…………………………..……………………… 4. Have they drawn the picture? .......................................................... 5. Someone has sent me a postcard …………………………………… 6. He has paid the bill… ……………………………………………… 7. They have watered the plants ………………………… 8. Has someone made the mistakes ? ……………………. 9. The people haven’t produced that paper …………………………………………… 10. They have wore Jeans for a long time ………………………………………………… giúp eim zới

Đề bài : cho tam giác ABC vuông tại A, đg cao AH . Tính độ dài AC, biết AH= 6cm, BH= 4,5cm