Quasars __________ emitting visible radiation and extremely intense radio waves.
In the course of her life, Mary Sadlier ___ , some fifty of them original novels and collections of stories.
____ lived on the North Saskatchewan River long before the Hudson’s Bay Company built a fur trading post there.
Because the papaya grows easily from seed, ____spread from its home in Central America and now grows throughout the tropics.
____a two-chamber, or bicameral parliament.
As resident of New Mexico, Dennis ____ to the House of Representatives in 1930 and to the Senate in 1938.
Pansies can be cultivated easily in home gardens, but ____ much water and not too much sun.
____ about individuals who really existed and things which actually happened.
Portland, Maine, is _____ the poet Henry Wadsworth Longfellow spent his early days.
_____ that ornithischians, planteating dinosaurs, lived about 225 million years ago.