Ответ:

1) Have you already tried (already to try) your new T-shirt on, Liz? - Yes, I tried (to try) it on some minutes ago. I have never had (never to have) such a nice T-shirt. 2) The police have just arrested (just to arrest) Tony. - Really? What has he done (to do)? - They say he stole (to steal) somebody's credit card three days ago. 3) Imagine how much we have done (to do) since Frank offered (to offer) us his help. 4) I don't think Alice has changed (to change) a lot since we graduated (to graduate) from university. 5) Sue came (to come) up to the front door and pushed (to push) the doorbell, but nobody answered (to answer). 6) Why has Kate taken (to take) all the food away? - I'm not hungry. I had (to have) a snack just an hour ago. 7) Where have you been (to be) since morning, Bob? Henry has phoned (to phone) you several times today. When did he phone (to phone) me last time? - Half an hour ago. 8) Why has Dolly chosen (to choose) this hotel? - Her friend stayed (to stay) in this hotel last year and she strongly recommended (to recommend) Dolly to spend her holidays here. 9) Have you travelled (to travel) by ferry before, Tim? - Yes, I have. But I travelled (to travel) when I was (to be) a little boy and I don't remember that voyage very well. 10) Why haven't you unpacked (not to unpack) your suitcase yet, Ron? - I came (to come) only half an hour ago and decided (to decide) to take a shower first.