16.

  1. Coughing fits.
  2. Blood phlegm.
  3. Bad breath.
  4. Blood urine.

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17.

  1. A week.
  2. Some time.
  3. One month.
  4. Two days.

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18.

  1. Greenish.
  2. Yellowish.
  3. Yellowish and jelly-like.
  4. Foamy.

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19.

  1. He coughs a lot.
  2. His phlegm doesn't smell strange.
  3. There is some blood in his phlegm.
  4. He doesn't take any medication.

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20.

  1. Asthma.
  2. Bronchitis.
  3. Lung cancer.
  4. Esophagus cancer.

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M:Dr. Wang, I called you last week to make an appointment.
W:Oh, yes. I got it from my nurse. What seems to be the problem?
M:I seem to be short of breath.
W:Do you have a cough?
M:Yes, I have a cough, but I also seem to wheeze a lot.
W:Is this a recent symptom, or have you had it for some time now?
M:I've had it for some time, Doctor.
W:Do you suffer from coughing fits or cough a lot?
M:Yes, a lot.
W:Do you bring up phlegm or is it a dry cough?
M:I bring up quite a bit of phlegm. I'm afraid I might have asthma.
W:What's the phlegm like?
M:What do you mean?
W:Can you describe the phlegm for me? What colour is it? Is it white, yellow or greenish, and is it foamy or sticky?
M:Yes, it's yellowish and feels kind of like jelly.
W:Does it have a strange smell or taste?
M:No, I don't think so.
W:Has there ever been blood in it?
M:Yes, just once I noticed some blood in it.
W:Have you taken any medication lately?
M:Yes, I was on something to thin my blood.