4. What is the MOST effective way to combine sentences 5 and 6? Specific, expensive shoes designed for running, basketball, tennis, and other sports were made by manufacturers in the 1980s. In the 1980s manufacturers began making expensive shoes, specifically designed for running basketball, tennis, and other sports. Since there were specific shoes for running, basketball, tennis, and other sports, manufacturers began making extremely expensive sneakers in 1980s.