Chia hai động từ trong ngoặc ở hai thì quá khứ và tiếp diễn : 

1. She ( do ) is doing her homework when the phone ( ring )is ringing last night .

2. What you ( do ) last night ? ( câu này chỉ dùng đc ở thì quá khứ )

Last night ? It ( be ) so humid so I ( go) out with my friends .

3. He ( wash )is washing his hair when the etectricity was cut.

Chia hai động từ trong ngoặc ở hai thì quá khứ và tiếp diễn : 

1. She ( do ) did her homework when the phone ( ring ) reng last night .

2. What did  you ( do )do last night ?

Last night ? It ( be )was so humid so I ( go) went out with my friends .

3. He ( wash ) washed his hair when the etectricity was cut.

Số kg bánh buổi tối bán được là :

(23,5 + 16,5) : 2 + 3 = 23 (kg)

ĐS : 23kg

**** mình nha !

Tìm và sưa lỗi sai trong mỗi câu sau:

1. Ba gets ups at 6 o'clock and gets dressing.

ups => up ; dressing => dressed

2. Would you like some noodles? - Yes, I wouldn't. I'am not hungry but I'am thirsty. I'd like a cold drink.

Yes => no

3. What are you doing when it's cold?

Ko có lỗi sai 

4.Where is your classroom? - It's on the ninth floor.

Ko có lỗi sai

5. How do you say the world "businessman"? - B-U-S-I-N-E-S-S-M-A-N.

say => spell

6. After getting ups in the morning, Hoa washes heroin face,  brushes her tooth and then has breakfast.

ups => up ; heroin => her ; tooth=> teeth

7. How many homework does Ba have every day? - He has a lot of homework.

many => much

8. How often does Mr.Ba go to Hanoi? - Seldom, one a year.

one => once

9. Are you and Hoa in grade 6? - Yes, We are at class 6A.

at => in