$25.$ B

$⇒$ Twice as much $:$ Đắt hơn 2 lần

$26.$ B

$⇒$ As + adj / adv + as

$27.$ A

$⇒$ Twice as big as $:$ To hơn 2 lần

$28.$ B

$⇒$ So + adj + as

$29.$ C

$⇒$ S1 + is / are ( + not ) + short adj + er + than + S2.

$30.$ D

$⇒$ TLĐ +  as soon as + HTĐ

$31.$ B

$⇒$ S1 + is / are ( + not ) + as + adj / adv + as + S2.

$32.$ B

$⇒$ As + adj / adv + as

$33.$ D

$⇒$ As + adj / adv + as

$34.$ A

$⇒$ Twice as big as $:$ To hơn 2 lần

$35.$ C

$⇒$ S1 + is / are ( + not ) + as + adj / adv + as + S2

25. B - đắt hơn 2 lần

26. B - as adv as

27. A - to hơn 2 lần

28. B - so adj as

29. C - S1 tobe not adj-er than S2

30. D - TLDĐ as soon as HTĐ

31. B - S1 tobe not as adj as S2

32. B - as adv as

33. D - as adv as

34. A - to hơn 2 lần

35. C - S1 tobe as adj as S2