The occurrence edema^(A) indicates^(B) the presence of^(C) a serious illness^(D).

Atomic nuclei are^(A) believed^(B) to be composed by^(C) protons and neutrons in^(D) equal numbers for the lighter elements.

According legend^(A), Betsy Ross designed and sewed^(B) the first^(C) American flag^(D).

The middle ear^(A) is attached for^(B) the back of^(C) the throat by^(D) the eustachian tube.

Plants that sprout, grow, bloom, produce seeds^(A), and die within^(B) one year^(C) are classified for^(D) annuals.

A marionette is controlled by^(A) means strings^(B) connected^(C) to^(D) wooden bars.

In^(A) July of^(B) 1861, Pat Garrett killed Billy the Kid in a^(C) house close Fort Sumner^(D).

Many comfort heating systems using^(A) steam as^(B) a working fluid operate^(C) at^(D) the convection principle.

Mars's two small^(A) moons are irregularly^(B) shaped^(C) and covered for^(D) craters.