3. Do grammar exercises. 3.1 Write sentences in indirect speech.
1. The physicist said to the journalist: "We have already finished the experiment".
2. The young chemist said: "The discovery is of great practical value".
3. The engineers replied: "We must make the design accessible for cleaning».
4. The operator said: "It was difficult to maintain constant tempera-ture."
5. The scientist said: "We have been discussing the problem with our colleagues for two hours"
6. The researcher declared: "The development of the electronic computer has changed the scientific world".
7. The programmer argued: "Any programme contains at least one error".
8. The plumber reassured us: "From now on the tap will work perfectly well".
9. The chief said to a young designer: "Check the capacity of the engine".
10. The lecturer said: "The neutron was discovered in 1932".
3.2 Convey sentences in indirect speech.
1. The teacher explained, "In fact every hydraulic system can be reduced to a simple pump-motor system".
2. The expert said, "Laser cutting is excellent at processing different materials".
3. The researcher explained, "Radio waves have been used since 1931 to investigate celestial objects".
4. The oceanographer said, "We will develop innovative techniques to restore aquatic ecosystems".
5. The manager said, "We offer you a part-time job on your computer".

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