Complete the sentences using the words/phrases given

1. Why rice/be/staple food/Philippines?

2. Although Matha/live/Poland/tao year, she/only get/in Polish.

3. Eat/too much fast food/put people/risk/be/overweight/obse. 4. Unless she/leave/home now, she/miss/flight.

Past PerFect and Past simple

1. what...he (do)...after he (leave)...school?

2. before I (come)...here yesterday, my mother (call)...me

3. we were very tired last night because we (play)...football in the afternoon

4. Linda wasn't at home then, maybe she (go)...out

5. I (meet)...him twice before I (leave)...for London

6. when we (come)...to the movies, the film (already, begin)...

7. After I (finish)...my breakfast, I (get)...ready to go to school

8. by 2007, I (leave)...high school

9. he (leave)...his office after he (read)...the report

10. this worker (not, finish)...his work before you (move)...to here?

11. ...you (live)...in Hanoi before you (move)...to here?

12. I (go)...to bed before 9 p.m last night

13. he discovered that he (eat)...a fly

14. these students (take)...an exam before they (have)...a summer holiday last year

15. after getting up, the boy (brush)...his teeth and (have)...breakfast

16. he (not, lock)...the door before going to work this morning

giúp mk vs ạ, mk đg cần gấp

Cho ∆ABC vuông tại A, đường cao AH, biết AB=100cm, BH=5cm. C/m tanB=3 tanC

cho tam giác ABC vuông tại A đường phân giác AD chia cạnh BC thành 2 đoạn BD=36mm, CD=60mm. kẻ đường cao ah của tam giác ABC

a, tính tỉ số \(\dfrac{HB}{HC}\)

b, tính AH

vẽ hình giúp mk luôn đk ạ

Tìm x bt:

\(\sqrt{x^2+2x+1}\) = -x

Rút gọn:

a, \(\sqrt{\left(4-\sqrt{17}\right)}^2\) - \(\sqrt{17}\) 

b, \(\sqrt{\left(5-2\sqrt{3}\right)^2}\) - \(2\sqrt{3}\)

ng ta thả 1 miếng chì có khối lượng 300g đc nung nóng tới 100^oC vào 0,25 kg nc ở nhiệt độ 58,5^oC, nc nóng tới 60^oC

a. Tính nhiệt lượng của nc thu vào (lấy nhiệt dung riêng của nc 4200J/kg.K)

b. Tính nhiệt dung riêng của chì