Complete the sentences using the words in brackets in the correct form. 1) Space _ (explore'r helps to solve some scientific problems. 2) Russia is one the most important countries in space … research). 3) A Russian word for a satellite 'sputnik' has become (international) known. 4) Russia can be proud of a lot of _ (achieve) in space exploration. 5) A _ (research) is a scientist. 6) To do _ (research) on a problem means to … (explore) all the _ (possible) of solving it. 7) A _ (key) problem is a serious difficulty.
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27 марта 2025 10:00
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