21 i_ never seen a coral reef. i'd love to go diving one day.
d have
a didn't b haven't c did
22 i can't eat now. i've _ had dinner.
a yet b never c just d ever
the local environment.
23 our organisation is trying hard to
a destroy b pollute c protect d check
24 what _ like when temperatures rise by 2°c?
a the world will b the world will be
c will the world d will the world be
25 i'm _ play tennis with you again. you're too good!
a not going b not go to c not going to d won't
26 are you interested _art?
a of b in c at don
27 the children never sit down! they are so _
a emotional b optimistic c ambitious d energetic
28 who lives in that house?
a yes, i do. bi live cido. di am.
29 'who does ben sit next to? '
a yes, he does. b tom does. c tom. d tom sits.
30 how can joe afford _ a new laptop?
a buying b buy c buys d to buy
31 sam doesn't mind a bit longer.
a waits b waiting c wait d to wait
32 find the icon and_ it.
a open b visit c click on d log on
33 do you _ any celebrities on twitter?
a visit b update c tweet d follow
34 what were you doing when you _ the text?
a were getting b got c get d getting
35 what time _ you go to bed last night?
a were bhad c went d did
36 apollo 11 _ on the moon in 1969.
a landed b did land c has landed d was landing
37 _ your parents use to have mobile phones when they were younger?
a were b are c did d do
38 jackie didn't _ to like coffee, but she loves it now.
a use b usually c used d uses
39 what's your favourite _ on this album?
a scene b chapter c track d verse
40 they're showing the first of a new sitcom tonight.
a scene b episode cact d chapter​

21. b haven't - I have never seen a coral reef. The use of "haven't" indicates that the speaker has not had the experience of seeing a coral reef.

22. a yet - I can't eat now. I haven't had dinner yet. The use of "yet" indicates that the speaker has not yet completed the action of having dinner.

23. c protect - Our organization is trying hard to protect the local environment. The use of "protect" indicates that the organization is making efforts to keep the local environment safe and free from harm.

24. b the world will be - What will the world be like when temperatures rise by 2°C? The use of "will be" indicates a future possibility or outcome.

25. c not going to - I'm not going to play tennis with you again. You're too good! The use of "not going to" indicates a decision or intention not to engage in the activity of playing tennis.

26. b interested in - Are you interested in art? The use of "interested in" indicates a person's interest or liking for something.

27. d energetic - The children never sit down! They are so energetic. The use of "energetic" describes the children's behavior as full of energy and active.

28. di am - Who lives in that house? I am. The use of "I am" indicates that the speaker himself lives in that house.

29. d tom sits - 'Who does Ben sit next to?' Tom sits. The use of "Tom sits" indicates that Tom is the person who Ben sits next to.

30. a buying - How can Joe afford buying a new laptop? The use of "buying" indicates the action that Joe will take to afford a new laptop.

31. b waiting - Sam doesn't mind waiting a bit longer. The use of "waiting" indicates the action that Sam doesn't mind doing.

32. c click on - Find the icon and click on it. The use of "click on" indicates the action that needs to be taken with the icon.

33. d follow - Do you follow any celebrities on Twitter? The use of "follow" indicates the action of subscribing to or keeping up with the updates of celebrities on Twitter.

34. b got - What were you doing when you got the text? The use of "got" indicates the moment when the speaker received the text.

35. d did - What time did you go to bed last night? The use of "did" indicates the past action of going to bed.

36. a landed - Apollo 11 landed on the moon in 1969. The use of "landed" indicates the action of the spacecraft reaching the moon's surface.

37. a were - Did your parents use to have mobile phones when they were younger? The use of "were" indicates the past condition or state of the parents during their youth.

38. c used - Jackie didn't use to like coffee, but she loves it now. The use of "used" indicates a past action or habit that Jackie had in the past.

39. c track - What's your favorite track on this album? The use of "track" refers to a specific song or piece of music on the album.

40. b episode - They're showing the first episode of a new sitcom tonight. The use of "episode" refers to a specific installment or part of a TV series.