Proofreading Exercise 15
Disappearing Dinosaurs
Print this sheet and mark the error type (see table at left) above the mistaken word or expression. Then write the correction on the line at the right. There is one mistake in ALMOST every line.
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____________(1)

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Scientists believe dinosaurs become extinct about 65

millions years ago, but they do not know why this

is happened. One theory is that they had weak lungs

and could not cope with a sudden drop in the worlds

oxygen levels. Another is that a giant asteroid hits the

Earth causing massive dust storms blocked sunlight

and killed plants. Why are humans so interesting in

dinosaurs? Perhaps investigation the disappearance

of these once all-powerful animals will tell us how

long mankind itself can expect to survival.
Art
>Adj
>Adv
>N
>Vb
#
Prep
Pron
P
Sp
Vb

/\
Un
SS

___/-----
Article
to Adjective
to Adverb
to Noun
to Verb
Number
Preposition
Pronoun
Punctuation
Spelling
Verb

Insert
Unnecessary
Sentence
   Structure
Transpose
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