Có đấy bạn

20

1. I (see) saw her yesterday

2. I (not/see) didn't see her yesterday

3. I (tobe/ not)wasn't a good student when I (tobe)was 10 years old.

4. Did You (see) see her last week?

5.were (Tobe) you sick last Monday?

6. They played (play) music in 1998.

7. They (not/play)didn't play music two days ago.

8. Did They (play) play music when they (be) were young?

9. They (tobe/not)weren't musicians last summer party.

17 We( get)got up late yesterday morning

18 Martha ( not phone)didn't phone me yesterday

19 She ( have)had a great time five days ago

20. When Did you ( move)move to Da Nang? - Two years ago

Tác dụng: chú thích

a) nhiệt độ cân bằng:\(\Delta t^o=30-20=10^o\)

3. My motorbike was repaired… (repair) last week.

4. My laptop is being used… (use) by my father now.

5. The room…is cleaned……(clean) everyday.

6. Game……was played….(play) by John yesterday.

7. Flowers in our garden…are watered.(water) by my mother every morning.

8. The Coronavirus problem…have been discussed…..(discuss) since last week.

9. …are….the postcards…sent….(sent) to your friends?

10. How many languages…are spoken….(speak) in Canada?

a) ta có D1=B1( gt)

Mà B1=B2( gt) => B2=D1=> ED//BC( slt)

B)Ta có EF//BD => E2=B2( đồng vị)

           EF//BD => E1=B1( đồng vị)

Mà B1=B2(gt)

=> E1=E2 => EF là pg AED