His brother always stays up late. It means : “…………’
B. His brother never goes to bed early
   stay up late: ngủ muộn
   go to bed: lên giường (để đi ngủ)
29. Sarah is very thirsty . She drinks two glasses of water.  
   thirsty: khát 

 Why does Phillip want to be an engineer?
   Wh/H + do/does + S + V + O

Why don’t we go to the beach on Sunday?
   beach: bãi biển

They grow vegetables and fruit from seeds and they hunt animals for their meat. 
   hunt animals: săn, bắt thú, động vật

33. Don’t eat too much meat. 
   `->` Ăn nhiều thịt không tốt cho sức khỏe, còn những đáp án còn lại (oranges, apples, juice) tốt cho sức khỏe.

Which country do you want to visit?
   Which + N + do/does + S + O: câu hỏi về sự lựa chọn
 
  How would you feel when you receive a present from Harry?
   Wh/H + động từ khuyết thiếu + V + O
Whose car is this, Mary’s or Tom’s ?
   Whose: của ai

You should protect the environment and wild animals.
   wild animals: động vật hoang dã

Students are waiting for the bus stop now.

   now = at the moment: hiện tại, ngay bây giờ (thì HTTD)

Children shouldn't eat too many candies at night.

   shouldn't + V: không nên làm gì