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Discover LudwigThe phrase "topic on" is not correct English.
English requires that a preposition be used after a noun. A correct phrase might be "topic about" or "topic regarding." Example: I am researching a topic about the environmental effects of global warming.
Exact(60)
But there's one topic on which they agree.
Bullying was also a topic on Sunday.
(Apparently, it's a hot topic on YouTube).
Why is this topic on our agenda?
Financial concerns are the new topic on campus.
What's the hottest topic on the British stage right now?
Lemieux's return was the main topic on media day.
Mrs. Clinton declined to wade into the topic on Thursday.
It's a hot topic on many technology blogs.
More important, #HillarysHealth became a national trending topic on Twitter.
We enjoyed a recurring topic on this blog: abandoning books.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com