31. C-> looking after
- look after: chăm sóc, trông nom
32. D-> the following day
- Câu gián tiếp tomorrow-> the next day/ the following day, câu thiếu "the"
33. B-> using
- get used to Ving: quen với việc làm gì
34. C -> because of
- because+ Mệnh đề= because of + N(s/es)/ Ving
35. C
- cấu trúc such.. that: S+ be + such + (a/an)+ adj+ N(s/es)+ that + S+ V (chia)...
36. A
- The last time + S+ V2+ was+ time+ ago
-> S+ has/have+ not+ PII+ for+ time