The diagram below shows the development of cutting tools in the Stone Age.

The diagram illustrates the development of Stone Age cutting tools, comparing
Tool
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A from 1,4
million
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years
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ago with
Tool
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B from 0,8
million
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years
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ago, shown from the front, side,
back
Correct word choice
and back
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views.
Overall
Linking Words
, the
later
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latter
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tool
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appears noticeably more refined, symmetrical and sharper than its earlier counterpart,
although
Linking Words
both are of roughly similar length (5cm). The most significant changes related to improved shaping, smoother surface and thinner edges.
Tool
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A, dating back 1,4
million
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years
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, has an irregular and relatively crude appearance. From the front and back views, its outline is uneven, with a broader middle section and a less clearly defined tip. The surface looks rough and chipped, suggesting limited craftsmanship. The side view indicates that the
tool
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is comparatively thick, with blunt edges rather than sharp cutting sides.
By contrast
Linking Words
,
Tool
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B, from 0,8
million
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years
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ago, demonstrates clear advancement. Its front and back views reveal a more symmetrical, tear-drop shape that
taper
Correct subject-verb agreement
tapers
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gradually towards a
point
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pointed
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tip. The edges appear sharper and more evenly flaked,
while
Linking Words
the side view shows a thinner profile than
Tool
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A. These improvements suggest that
stone working
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stone-working
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-
Punctuation problem
apply
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techniques had become more sophisticated over time, resulting in a more efficient cutting instrument.

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Sentences: Add more complex sentences.
Vocabulary: Rephrase your introduction. Words match: 71%.
Vocabulary: Replace the words tool, million, years with synonyms.
Vocabulary: Rephrase the word "undefined" in your introduction.
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