The following passage contains 12 errors. Each line contains a maximum of one error, and three are free from error. In each case only one word is involved. You should proofread the passage and correct it in the following way:

For a wrong word, underline the wrong word and write the correct one in the blank provided at the end of the line.

For a missing word, mark the position of the missing word with a "∧" and write the word you believe to be missing in the blank provided at the end of the line.

For an unnecessary word, cross out the unnecessary word with a slash , "/" and put the word in the blank provided at the end of the line.

If the line is correct, place a tick "√" in the blank at the end of the line.

Example: It is impossible ∧ any sentence in one language to have exactly (1)____for_____

the same meaning as any single sentence in another language. It is also (2) ____single__

impossible for any sentence in a particular language to have exactly (3) ____√_____

the same meaning as the other sentence in that same language. (4) any_____

The motion of the sun along the ecliptic is, of course

merely a reflection of the revolution of the earth . (1) __________

around the sun, but the ancients believed earth was

fixed and the sun had an independent motion of its (2) __________

own, eastward among the stars. The glare of sunlight

hide the stars in daytime, but the ancients were aware (3) __________

that the stars were up there even at night, and the slow

eastward motion of the sun around the sky, in the (4) __________

rate of about thirty degrees each month, cause different

stars to be visible at night at different times of the (5) __________

year. The moon, revolves around the earth each month,

also has an independent motion in the sky. (6) __________

The moon, however, changes its position relatively

rapid. Although it appears to rise and set each (7) __________

day, as is nearly everything else in the sky, we

can see the moon changing position during as short (8) ___________

an interval as a hour or so. The moon's path around

the earth lies nearly in the same plane as the earth's (9) ___________

path around the sun, so the moon is never seen very

far from the ecliptic in the sky. There are five other (10) __________

objects visible to the naked eye that also appear to

move in respect to the fixed background of stars (11) __________

on the celestial sphere. These are the planets Mercury,

Venus, Mars, Jupiter, and the Saturn. All of which (12) __________

revolve the sun in nearly the same plane as the

earth does, so they, like the moon, always appear (13)__________

near the ecliptic. Because we see the planets

from the moving earth, however, they behave in a (14)__________

complicated way, with their apparent motions on the

celestial sphere reflecting both their won dependent (15)__________

motions around the sun and our motion as well.