Exercise 2.Make a sentence out of the two parts, 1. Experts estimate that within 1. for industrial production of a few coming years new-generation materials at a larger scale is being carried out in Russia, the USA, Europe and Ja­pan. 2. Numerous experiments on 2. very difficult on Earth. board 3. They may include 4. In space there is no gravita­tional convection 5. Convection makes the pro­duction of some materials 6. But in zero-gravity condi­tions it is possible 7. It should be said that research and preparatory work 3. i.e. movement of gases or liq­uids because of difference of tem­peratures. 4. to grow large crystals and to study their structure. 5. super and semiconductors, metals, glasses, superpure biologi­cally active substances, etc. 6. the industrial production of various materials is to begin in space. 7. the Russian manned and un­manned space vehicles and space stations proved the advantages of the zero-gravity state for the pro­duction of some materials.