D

A

4: did

5: haven't seen

3: will be

1: has not eaten

2: won't go

Giúp mình bài này với !

1. Mary ( eat) has eaten meat since May.

2. John ( not go ) won't go to the cinema tomorrow.

3. She ( be) will be 8 years old next Monday.

4. What you ( do ) did you do  at the party last night ?

5. I ( not see ) Haven't I seen her since last month ?

6. You ever ( meet ) Have you ever met her ?

1. I used to stay up late to watch football matches last year, but now I don't.

2. There used to be some trees in the field, but now there aren't any. 

3. Anna used to live with her parents.

4. He used to be a poor man, but he become a rich businessman.

5. They didn't use to go to the cinema every Sunday last year, 

thanks

ko có j đâu bạn nhé!

thx nha bạn

Lỗi sai: go 

Sửa lại : went 

Lí do yesterday là nói về quá khứ mà lại dùng động từ ở hiện tại (Sai)

1. I stayed at home  last Sunday. 
2. Angela went to the cinema last night. 
3. My friends had a great time in Nha Trang last year. 
4. My vacation in Hue was wonderful. 
5. Last summer I visited Ha Noi. 
6. My parents was very tired after the trip.
7. I buy a lot of gifts for my little sister. 
8. Lan and Mai saw a lot of animals at the zoo. 
9. Trung eats chicken and rice for dinner. 
10. They talk about their holiday in Hoi An. 
11. Phuong gave me a doll on my last birthday.
12. She said the food was delicious. 
13. I worked in a bank for ten years. 
14.  She studied French at university. 
15.  He traveled through the Middle East last year. 
16.  She watched TV yesterday. 
17.  We bought a new car last weekend. 
18.  He knows that he is right. 
19. I made coffee this morning . 
20. She wrote to her grandmother

tick cho mình nha thank you !

1. has

2. Did... go

  went

3.

4. to go

5. to buy  

1 has,  is having

2 Did ..... went

3 having

4  to go

5 to buy

đây là câu trả lời của mk

1. Hoa usually has bread for breakfast, but today she has noodles.

2. Did you go to the zoo last Sunday ? Yes, I do there with Phong.

3. What about having a party ?

4. I'd  to go  to the cinema.

5. Do you want to buy any books ?

Chúc bạn học tốt nha !

Bài 5 hình 1: (tự vẽ hình nhé bạn)
a) Xét ΔABD và ΔACB ta có:
\(\widehat{BAD}\)= \(\widehat{BAC}\) (góc chung)
\(\widehat{ABD}\)= \(\widehat{ACB}\) (gt)
=> ΔABD ~ ΔACB (g-g)
=> \(\dfrac{AB}{AC}\) = \(\dfrac{BD}{CB}\) = \(\dfrac{AD}{AB}\) (tsđd)
b) Ta có: \(\dfrac{AB}{AC}\) = \(\dfrac{AD}{AB}\) (cm a)
=> \(AB^2\) = AD.AC
=> \(2^2\) = AD.4
=> AD = 1 (cm)
Ta có: AC = AD + DC (D thuộc AC)
      => 4   =   1   + DC
      => DC = 3 (cm)
c) Xét ΔABH và ΔADE ta có: 
   \(\widehat{AHB}\) = \(\widehat{AED}\) (=\(90^0\))
   \(\widehat{ADB}\) = \(\widehat{ABH}\) (ΔABD ~ ΔACB)
=> ΔABH ~ ΔADE
=> \(\dfrac{AB}{AD}\) = \(\dfrac{AH}{AE}\) = \(\dfrac{BH}{DE}\) (tsdd)
Ta có: \(\dfrac{S_{ABH}}{S_{ADE}}\) = \(\left(\dfrac{AB}{AD}\right)^2\)= \(\left(\dfrac{2}{1}\right)^2\)= 4
=> đpcm

Tiếp bài 5 hình 2 (tự vẽ hình)
a) Xét ΔABC vuông tại A ta có:
\(BC^2\) = \(AB^2\) + \(AC^2\)
\(BC^2\) = \(21^2\) + \(28^2\)
BC = 35 (cm)
b) Xét ΔABC và ΔHBA ta có:
\(\widehat{BAC}\) = \(\widehat{AHB}\) ( =\(90^0\))
\(\widehat{ABC}\) = \(\widehat{ABH}\) (góc chung)
=> ΔABC ~ ΔHBA (g-g)
=> \(\dfrac{AB}{BH}\) = \(\dfrac{BC}{AB}\) (tsdd)
=> \(AB^2\) = BH.BC
=> \(21^2\) = 35.BH
=> BH = 12,6 (cm)
c) Xét ΔABC ta có:
BD là đường p/g (gt)
=> \(\dfrac{AD}{DC}\) = \(\dfrac{AB}{BC}\) (t/c đường p/g)
Xét ΔABH ta có: 
BE là đường p/g (gt)
=> \(\dfrac{HE}{AE}\) = \(\dfrac{BH}{AB}\) (t/c đường p/g)
Mà: \(\dfrac{AB}{BC}\) = \(\dfrac{BH}{AB}\) (cm b)
=> đpcm
d) Ta có: \(\left\{{}\begin{matrix}\widehat{HBE}+\widehat{BEH}=90^0\\\widehat{ABD}+\widehat{ADB=90^0}\\\widehat{HBE}=\widehat{ABD}\end{matrix}\right.\)
=> \(\widehat{BEH}=\widehat{ADB}\)
Mà \(\widehat{BEH}=\widehat{AED}\) (2 góc dd)
Nên \(\widehat{ADB}=\widehat{AED}\)
=> đpcm

A = {6;12}

b: B={90;180;270}

Con đĩ này ngu chết mẹ luôn