A: Did you buy (you /buy) anything at the antiques sale yesterday? B: No. I wanted (I /want) to buy...

1. B: No, that's all of them. I have finished now.
2. B: How long have we been waiting now? A: At least half an hour we have been here since ten to five.
3. B: No, not really. When we were drinking our coffee, she hurried off home.
4. B: Yes, awful. I was having breakfast when I heard the news.
5. B: Oh, since I was sixteen. We have done about a dozen concerts.
6. B: No, I don't. But I'm sure she was crying. Her eyes looked red. A: Perhaps she had some bad news.
7. B: It certainly was. When we heard the shot, we all threw ourselves to the floor.

Sure, let's go through each of the prompts and fill in the blanks with appropriate verb forms. I'll provide explanations for each choice to help you understand the reasoning:

1. A: Are you still copying those addresses?
   B: No, that's all of them. I've finished now.

   • Here, "I've finished" (I have finished) is in the present perfect tense, which is used to indicate that an action has been completed recently and has relevance to the present moment.

2. A: The train is never going to get here.
   B: How long have we been waiting now?
   A: At least half an hour we've been here since ten to five.

   • "Have we been waiting" is in the present perfect continuous tense, emphasizing the duration of the waiting period up to now. "We've been" (we have been) indicates a continuous state from the past until now.

3. A: Did you have a nice chat with Tessa?
   B: No, not really. When we were drinking our coffee, she hurried off home.

   • "We were drinking" is in the past continuous tense, setting the scene of an ongoing action when another action ("she hurried") occurred. "She hurried" is in the simple past tense, indicating a completed action.

4. A: It's terrible about that plane crash, isn't it?
   B: Yes, awful. I was having breakfast when I heard the news.

   • "I was having" is in the past continuous tense, describing an ongoing action interrupted by another action. "I heard" is in the simple past tense, indicating a specific point in time when the news was received.

5. A: So you sing in a rock band, do you? How long have you been doing that?
   B: Oh, since I was sixteen. We've done** about a dozen concerts.

   • "Have you been doing" is in the present perfect continuous tense, showing an action that started in the past and continues to the present. "We've done" (we have done) is in the present perfect tense, indicating completed actions with relevance to the present (number of concerts performed).

6. A: Do you know what Polly was so upset about yesterday?
   B: No, I don't. But I'm sure she was crying. Her eyes looked red.
   A: Perhaps she had some bad news.

   • "She was crying" is in the past continuous tense, suggesting an ongoing action that might explain her appearance. "She had" is in the simple past tense, suggesting a possible reason for her crying.

7. A: The shooting was very frightening, I suppose.
   B: It certainly was. When we heard the shot, we all threw ourselves to the floor.

   • "Heard" and "threw" are both in the simple past tense, indicating that these actions happened quickly and consecutively in the past.

By identifying the context and the time relationships between actions, you can choose the appropriate verb tenses to convey the right meaning.