Common Error Detection
Find out whether there is any grammatical error in below sentence. This book is / designed to increase / a working knowledge of / spoken and written English.

spoken and written English
This book is
a working knowledge of
designed to increase
No error

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Common Error Detection
Find out whether there is any grammatical error in below sentence: In a first of its kind study, / a team of scientist have tried to / 'grow' new stem cells in / the ear that get damage with age.

a team of scientist have tried to
'grow' new stem cells in
No error
In a first of its kind study,
the ear that get damage with age

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