Active and passive voice L-9, E-I, P-46.
Charles Goodyear ______________ (make) the first sneakers in 1917.
Charles Goodyear made the first sneakers in 1917.
Velcro ______________ (invent) by George de Mestral. It ______________ (use) to fasten two materials together. Many companies ____________ (use) Velcro on their clothing products.
Velcro was invented by George de Mestral. It was used to fasten two materials together. Many companies use Velcro on their clothing products.
Roy Plunkett ____________ (invent) Teflon in 1946. Teflon ______________ (apply) to cookware eight years later. Many cooks now ____________ (use) non-stick and pans.
Roy Plunkett invented Teflon in 1946. Teflon was applied to cookware eight years later. Many cooks now use non-stick and pans.