1".Don't go to bed too late" ,m mother said to me

----> My mother asked me not to go to bed too late

2.Although his leg was broken,he managed to ge out of the car

-----> In spite of his broken leg, he managed to ge out of the car

3. If someone doesn't put the coal in ,the fire will go out

-----> Unless someone puts the coal in, the fire will go out

4. They sais I was too old learn the piano

-----> They said I wasn't old enough to learn the piano

5.They will translate this book into English

---> This book will be translated into English

Choose a, b, c or d that need correcting.

21. She wishes she isthe most intelligent girl in the class.>> were

a b c d

22.Would you likevisiting the museum with us ?>> to visit

a b c d

23. Would you mindto openthe door ?>> opening

a b c d

24. All the main streetsin this city will be widening >> widened

a b c d

25. When she came, I havedinner.>> Was having

a b c d

 Theo tính chất của đẳng thức  

a/b=b/c=c/d ta có  

(a+b+c)/(b+c+d)= a/b=b/c=c/d (1)  

mặt khác   a/b=b/c--->a=b^2/c (2)  

c/d=b/c=>d=c^3/b (3)  

Ta có (2)/(3)=a/d= b^3/c^3   

(a/d)=(b/c)^3 (4)  

Tu (1 ) thì (a+b+c)/(b+c+d)=b/c  

Vậy kết hợp (1) => [(a+b+c)(b+c+d)]^3=(a/d)

cau 2 

cau thanh tri dai hon lay 3084-1230

Rewrite sentences with the word given:

1. I go to the post office on foot.

=> I walk to the post office

2. She rode her bike to school.

She went to school by bike

3. Let's play table tennis this afternoon.

What about playing table tennis this afternoon.