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StartFragment> There is a sentence which seems to have a problem in agreement.
During the Pleistocene glacial periods there were portion of the Earth where plant and animal life flourished, making it possible for people to subsist.
"there was" seems better than "there were" because "portion of the Earth" sounds singular.
So I looked up Longman Dicitonary of Contemporary English.
In that dictionary :
3 [usually singular] a share of something, such as responsibility, blame, or a duty, that is divided between a small number of people
• The other driver must bear a portion of the blame for the accident.
It says "portion of" is [usually singular].
That is, we cannot say it should be 100% "there was."
Sometimes "there were" can be possible.
Do you agree with my reasoning?