44. A patient is unlikely to make fast progress toward full recovery ____.
1. if he takes medicine regularly
2. once he takes medicine regularly
3. unless he takes medicine regularly
4. when the medicine is regularly taken
45. The new product was not popular for two reasons: _____.
1. one was its quality, the other the price
2. the quality was one, another was its price
3. its quality was one of them, the price was other
4. the first one its quality, the price was another one