1.Abraham Lincoln loved to play and enjoy visiting all the most popular performances in the theaters of Washington.
2.Making fire by friction gave the first man dominion over a certain force of nature, and so completely separated the human from the animal kingdom.
3. а)Light pressure was discovered by the prominent Russian scientist Lebedev at the end of the last century. ( в значении "свет")
б)Аs light as a feather .( в значении "лёгкий")