Halley's Comet had its first documented sighting in 240 B. C. in China and ............................. it has been seen from the Earth 29 times.

Outside the bright primary rainbow, ........................... much fainter secondary rainbow may be visible.

During the course of its growth, a frog undergoes a true metamorphosis ........... with a fishlike larval stage.

Associated with the Denishawn company from 1916 to 1923, Martha Graham developed a powerful, ........................ that was integral to the foundations of modern dance.

............. that managers commit in problem solving is jumping to a conclusion about the cause of a given problem.

Mahalia Jackson, .................. combined powerful vitality with great dignity, was one of the best-known gospel singers in the United States.

Following the quidelines for speaking and voting established but the book Robert's Rules of Order, ............... during meetings.

The best known books of Ross McDonald, .........................................writer of detective novels, feature the character Lew Archer, a private detective.

Because it was so closely related to communication, ................... art form to develop.

Some snake lay eggs, but others ........................... birth to live offspring.