Подчеркните в каждом предложении глагол-сказуемое и обусловьте его видовременную форму и

Подчеркните в каждом предложении глагол-сказуемое и обусловьте его видовременную форму и залог. 1. It will help us to define the dimensions of the cube. 2. For more than four centuries telescopes have been the Earths window on the universe. 3. The telescope is housed in a tower with a revolving 1000-ton dome. 4. A great many scientists from various institutes were involved to work at the design of the hydro engineering complex. 5. A special group worked at the system of television control. 6. Physics is one of the ancient sciences about nature.