29. Because Nga was sick yesterday, she couldn't go to school for her English lessons.
- Because: introduces the reason for Nga not going to school.
- Nga: the subject of the sentence.
- sick: the reason for Nga not going to school.
- yesterday: specifies the time when Nga was sick.
- go to school for English lessons: the action that Nga couldn't do because she was sick.

30. The boy reading a book over there is my student.
- The boy: the subject of the sentence.
- reading a book over there: the action that the boy is doing.
- is: the linking verb that connects the subject "the boy" with the complement "my student".
- my student: the complement that describes the boy.

31. Why don't we reduce the amount of garbage we produce?
- Why: introduces a question.
- don't we reduce: the action of reducing the amount of garbage.
- the amount of garbage we produce: the object of the action, specifying what needs to be reduced.

32. The students who live in that dormitory are from Australia.
- The students: the subject of the sentence.
- who live in that dormitory: the relative clause that describes the students.
- are: the linking verb that connects the subject "the students" with the complement "from Australia".
- from Australia: the complement that describes the students.

33. Thuy can't go to the cinema tonight because she has to do her homework.
- Thuy: the subject of the sentence.
- can't go to the cinema tonight: the action that Thuy cannot do.
- because: introduces the reason for Thuy not going to the cinema.
- she has to do her homework: the reason for Thuy not going to the cinema.

34. Although Phong's house is far from school, he always goes to school on time.
- Although: introduces a contrast or contradiction.
- Phong's house: the subject of the sentence.
- is far from school: the description of the location of Phong's house.
- he always goes to school on time: the action that Phong always does, despite the distance.

35. Lan enjoys the peaceful atmosphere while Maryam is praying.
- Lan: the subject of the sentence.
- enjoys: the action that Lan is doing.
- the peaceful atmosphere: the object of the action, specifying what Lan enjoys.
- while: introduces the simultaneous action of Maryam praying.
- Maryam is praying: the action that Maryam is doing at the same time as Lan is enjoying the peaceful atmosphere.