помогите с английским, пожалуйста!

1) My little sister has just (discovered) that Santa Claus (does not exist). She (has believed) in him (since) the day she (was) born.

2) Can you (draw) pictures with the help of your new computer? - I (do not know). I (have not done) it yet.

3) Have you (found) your pen? - No. But honestly speaking, I even (have not looked) for it.

4) Do you like reading? - Yes, I (have read) three books this week.

5) Who (broke) my favourite cup? - It (was) me. I (broke) it when I was washing up.

6) Mum, this is a baby bird that (has fallen) out of the nest.

7) Where is Mum? Where has he (gone)? - I'm not sure, but I think she (has gone) to the market. Yesterday she (said) she (needed some vegetables.

8) We (have had ) this cottage for 15 years and we like it very much.

9) How long have you (been) here? - We (arrived) 2 days ago. So, we (have been) here for nearly three days.

10) I (have known) Peter all my life. - And I (have known) him only since the last conference.