Cấu trúc so... that: S + to be + so + adj + that + S + V + (O)

31. They are tall. They can take part in that game.

=> They are so tall that they can take part in that game.

32. Her grandmother was quite old. She couldn't live alone.

=> Her grandmother was so old that she couldn't live alone.

33. The modern car is very expensive. We can't buy it.

=> The modern car is so expensive that we can't buy it.

34. He is very smart. He solves the problems quickly.

=> He is so smart that he solves the problems quickly.

35. The children were very noisy. Their parents couldn't sleep.

=> The children were so noisy that their parents couldn't sleep.

ĐÁP ÁN VÀ GIẢI THÍCH ĐÂY NHA 

$Answer$ 

$31 ⇒$ They are so tall that they can take part in that game.

$32 ⇒$  Her grandmother was so old that she couldn't live alone.

$33 ⇒$ The modern car is so expensive that we can't buy it.

$34 ⇒$ He is so smart that he solves the problems quickly.

$35 ⇒$ The children were so noisy that their parents couldn't sleep.

$*$ CẤU TRÚC SO THAT : 

$→$ S + be + ( not ) + so adj + that + S + V 

$→$ Quá .... đến nỗi mà 

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