1.5.6. Underline the mistakes. Rewrite the sentences correctly.
1) I am doing this exercise for an hour.
2) What have you been doing all day? - I have written emails.
3) Why are your eyes red? - I have peeled onions.
4) I wait for you for ages! Where have you been?
5) Where's Tom? - He is studying at the library. - How long has he studied there?
6) What's the noise? - Mark has been breaking a plate.
1.5.7. Complete the sentences with any appropriate time expressions.
1) I have been learning Spanish since last year