Alright, let's complete the dialogue using the present perfect tense and 'for' or 'since' and provide short answers when required.
Tom: You look terrible! How long **have you been feeling** (a) ill?
*Explanation:* Here, we need the present perfect continuous to ask about the duration of the feeling of being ill.
Mia: **I've been feeling** (b) ill since yesterday.
*Explanation:* The present perfect continuous is used to show an action that started in the past and is still ongoing.
Tom: **Have you been** (c) to the doctor?
*Explanation:* We are asking if Mia went to the doctor at any point in the past, requiring present perfect.
Mia: No, I **haven't** (d). I don't like going to see the doctor. I **haven't seen** (e) a doctor **for** (f) years.
*Explanation:* The negative short answer is 'No, I haven't.' Then, we need the present perfect to show an action not completed in the past, 'I haven't seen a doctor' and 'for' is used to show a period of time.
Tom: OK, you **haven't been** (g) ill a long time - only (i) a high temperature.
*Explanation:* Here we are stating a condition that started in the past.
Mia: I **haven't thought** (j) about that! And I don't want to think about it!
*Explanation:* Here, we use present perfect in a negative way, to mean that something hasn't happened until the moment of speaking.