Finish the sentences choosing the appropriate clause:
1. The patient stated that... (a) he had had pneumonia two years before; b) he has pneumonia) 2. The doctor thought that... (a) the white blood cell count will be normal; b) the white blood cell count would be normal) 3. The scientists established that... (a) hemoglobin was the carrier of oxygen; b) hemoglobin is the carrier of oxygen)
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