Direction: In the following two passages some of the words have been left out. Read the passages carefully and choose the correct answer to each question out of the four alternatives and fill in the blanks.

Passage I
How old is the Earth ? This is a (1036) to which we may never have the exact (1037). Man has (1038) about the age of the Earth since (1039) times, and there were all kinds of myths and (1040) that seemed to have the answer. When it was proven that the Earth (1041) around the Sun, (1042) then knew where to begin. To find the (1043) of the Earth, it was necessary to (1044) how the solar system was (1045).