46. My brother is crazy about football and never misses a much

- Be crazy about sth = Like sth: thích/hứng thú cái gì đó

47. They shouldn't be allowed to watch Tv too much

- Bị động ĐTKK: S + should (not) + be + VpII

- Allow sb to do sth: cho phép ai làm gì.

48. You needn't to send her a letter today.

- It's necessary (for sb) to do sth: cần thiết để làm gì..

= S + need + to V-inf: ai đó cần phải làm gì.

49. It's not easy to find an apartment in a big city.

- Ving + tobe + (not) + adj

= It's + adj + (for sb) + to do sth

50. We managed to dig the Panama Canal.

- Succeed in doing sth: thành công làm gì.

= Manage to do sth: xoay sở làm gì.