Question

giúp iem đi ạ pls

Answer 1

IV.

21. a -> an

22. polluted -> pollution

23. noisy -> noisier

24. Lucky -> Luckily

25. learning -> to learn

V.

26. visit her friend because she doesn't have time.

27. how much I thought it would cost.

28. gone aboard before.

29. been used for three months.

30. is considered to be one of the best.

Answer 2

IV:

21. an hour

22.

23. noisier

24. Luckily

25. to learn

V:

26.

She won't visit her friends because she hasn't time.

27.

He asked me how much I thought it would cost.

28

He hasn't gone abroad before.

29.

That computer has been used for 3 months.

30.

His speech was considered one of the best