20. `@` The stomachache prevented Mr Thanh from enjoying the meal.

  `-` Cấu trúc: Prevented sb/st from V-ing st = ngăn chặn ai làm việc gì đó.

21. `@` Because Lan had a sick , she didn't go to school.

  `-` Because `+` S `+` V `+` O . 

     `=` Because of + Pronoun/noun phrase .

22. `@` You'd better not eat too much meat.

  `-` S `+` shouldn't `+` V `+` O .

     `=` S `+` had better not `+` V `+` O .

23. `@` What is the weight of the chicken?

  `-` Cấu trúc : How `+` heavy `+` tobe `+` S ?

    `=` What `+` tobe `+` the weight `+` of S ?

Mr. Thanh couldn't enjoy the meal beacause of the stomachache .

-> The stomachache prevented ..................................................

21, Lan didn’t go to school yesterday because her sickness.

-> Because Lan ......................................

22,You shouldn’t eat too much meat.

-> You’d…………...........................

23,How heavy is the chicken?

-> What ............................................

$\text{Đáp án:}$

20, The stomachache prevented Mr. Thanh from enjoying the meal.

21, Because Lan was sick, she did not go to school yesterday.

22, You’d better not eat too much meat.

23,What is the weight of the chicken?

$\text{Giải thích:}$

20,Because of + noun/ noun phrase

21,Because+S+clause1+clause2.

22,You shouldn't+...(khuyên ai không nên làm cgi)

23,What+tobe+the weight+S

$\text{Dịch:}$

20, cơn đau bụng khiến ông Thành không thể thưởng thức bữa ăn.
21, Vì Lan bị ốm nên hôm qua cô ấy không đến trường.
22, Tốt nhất là bạn không nên ăn quá nhiều thịt.
23,Con gà nặng bao nhiêu?

$\color{green}{\text{meadow08}}$