Question

4. Complete the exchanges.
1) Can I take this seat? -- Yes, … .
2) May I use your bike? - No, I'm .
3) Can I borrow your book? - Yes, that's
4) Can I go home earlier? - OK. No …​

Answer 1

1) Can I take this seat? -- Yes, sure.

2) May I use your bike? - No, I’m afraid you can’t.  

3) Can I borrow your book? - Yes, that's fine.

4) Can I go home earlier? - OK. No problem.