Anonymous can you tell me why the prepositions 'at' and 'on' are needed? They are not needed. They are optional.
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Anonymouscan you tell me why the prepositions 'at' and 'on' are needed?They are not needed. They are optional.
Anonymouswe don't usually front the prespositions like 'at' or 'on' when using the words like 'where' or 'when' in questions.Correct. At where ...? is never used, for example.