5, C – play (play an important part/role: đóng một vai trò quan trọng)

6, C – lulls (v, ru ngủ)

7, D – When

8, A – in order to buy some food (in order to do sth: để làm gì)

9, C – different (adj, to be different from sth: khác biệt với cái gì)

10, D – up

11, C – How long

12, B – conserve (v, bảo tồn)

13, A – express (v, biểu lộ)

14, A – orphanage (n, trại trẻ mồ côi)

15, A – in (to be interested in sth: hứng thú với cái gì)

16, B – How far

17, B – joyfulness

18, C – by

19, D – Biodiversity (n, hệ sinh thái)

20, B – viewers (n, người xem)

21, A – in order to be healthy

22, D – to

23, B – so as to

24, D – that John came

25, C – excited

26, D – typed

27, D – had known

28, D – taught

29, B – to have

30, B – an/ a

 

Mình trình bày trong hình nhé >~<