Раскройте скобки, употребив Present Perfect, Past Perfect и Future Perfect. Переведите.
e.g. The students have discussed the famous scientists. The students had discussed the famous scientists. The students will have discussed the famous scientists.
1. The scientist … (write) about important events. 2. Food production … (increase) considerably. 3. The growth of population … (decline) significantly. 4. We … (translate) many articles. 5. The students … (not complete) the experiment.