Difference in using way and manner

[Garmasch]

Common Errors in English, Advanced Level

ESL/EFL Test #14 "Gerunds and Prepositions", question 6

You can easily tell that the parents paid a lot of attention to those children because they have excellent ways.

(a) easily
(b) paid
(c) those
(d) ways

Common Errors in English, Advanced Level

ESL/EFL Test #14 "Gerunds and Prepositions", answer 6

You can easily tell that the parents paid a lot of attention to those children because they have excellent manners.

Correct entry: manners
The error was: (d) ways

You have not found the error.
You can easily tell that the parents paid a lot of attention to their children because they have excellent ways.
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what different in using way and manner

Garmasch

[Pamela]

For me way and manner in one and the same sense are quite interchangeable,but here they have excellent manners means that children are cultured,well-bred