Question

1. Choose the appropriate tense-form.1. A. - What have you done/have you been doing with my knife? Where is it? B. - I've put it back in your drawer.A. - (taking it out) What have you done/have you been doing with it? The blade's all twisted! Have you been using/have you used it to open tins?2. A. - Do you see those people on that little sandy island? They have been waving/have waved their handker­chiefs for the last half-hour. I wonder why.B. - They need help. The tide is coming in and very soon that island will be under water. Have you sat/have you been sitting calmly without doing anything to help them?A. - I have never been/have never been being here before I haven't been hearing/haven't heard about the tideshere. What's up? What are you looking for/have you been looking for? Have you lost/have you been losing something? 3. A. - Are you still painting/have you been still painting your country house?B. - Yes. I'm painting/I've been painting it for several days already. I think it'll look beautiful when it's finished.

Answer 1

1.What have you done?
2.What have you been doing with it? | Have you used it... Хотя я бы написал Did you use it... 
3.They have been waving...
4.Have you sat.(Не очень понял вообще)
5.I ve never been here before.| I havent heard about tides.
6.What are you looking for?| Have you lost something?
7.Are you still painting your country house?
8.Yes. I have been painting it for several days alreay.

Answer 2

1. A. - What have you done with my knife? Where is it? B. - I've put it back in your drawer. A. - (taking it out) What have you done with it? The blade's all twisted! Have you been using it to open tins?

The appropriate tense-form for the first sentence is "have you been doing" as it refers to a continuous action in the past. For the second sentence, the appropriate tense-form is "have you been using" as it also refers to a continuous action in the past.

2. A. - Do you see those people on that little sandy island? They have been waving their handkerchiefs for the last half-hour. I wonder why. B. - They need help. The tide is coming in and very soon that island will be under water. Have you been sitting calmly without doing anything to help them? A. - I have never been here before I haven't heard about the tides here. What's up? What have you been looking for? Have you lost something?

The appropriate tense-form for the first sentence is "have been waving" as it refers to a continuous action in the past. For the second sentence, the appropriate tense-form is "have you been sitting" as it also refers to a continuous action in the past. For the third sentence, the appropriate tense-form is "have you been looking" as it refers to a continuous action in the past, and "have you lost" as it refers to a completed action in the past.

3. A. - Are you still painting your country house? B. - Yes. I'm painting it for several days already. I think it'll look beautiful when it's finished.

The appropriate tense-form for the first sentence is "are you still painting" as it refers to a continuous action in the present. The appropriate tense-form for the second sentence is "I've been painting" as it refers to a continuous action in the past.