1 A: What do you think of your new computer?
B: It's great. I haven't had any problems yet.
2. A: Have you been waiting long?
B: Yes, I've been here for an hour.
3. A: Shall we go to Paris next summer?
B: Sure! I have never been there before.
4. A: Have you ever traveled abroad?
B: No, I haven't.
5. A: How long has Kate been studying English?
B: She has been studying English since she was seven.
6. A: Should I tidy the living room?
B: No, I have already done it.