21. He is very good at c) MAKING friends.

22. It's a beautiful day. Come on. Let's go for a walk b) ALONG the river.

23. There's c) SOMEONE downstairs. I can hear a voice.

24. My mother has lots of grey a) HAIRS.

25. You can't c) WEAR jeans to the opera.

26. One day I went b) OUT with my friend Liz.

27. I'm not strong c) ENOUGH to lift it.

28. I haven't been on holiday b) SINCE last summer.

29. I woke up ten minutes b) AGO.

30. He used to have d) STRAIGHT fair hair.

Ответ:

21 d

22 a

23 c

24d

25c

26a

27a это не точно

28b

29b

30d