9. my/ opinion/ wear/ uniforms/ encourage/ students/ proud/ school//.
10. holiday/ be/ so/ disappointing/ they/ decide/ ask/ money/ back//.
11. if/ there/ be/ much/ exhaust fume/ air/ more/ people/ cope/ respiratory problem//.
12. you/ know/ name/ lecturer/ talk/ natural disasters/ workshop/ two days ago//?
thêm từ ngữ để câu được hoàn chỉnh.