I have to correct the sentence:
#1 The students blamed their professor for their late arrival in the concert.
I think it should be "at the concert". Sentence convey a meeting where professor had a responsibility to take all students to the concert, but they got late. Now they blaming their professor. OR it could be that professor himself was late at concert so we need to use here "his" instead of "their".
Thank you
Yes, at . Yes, thei r and his are both possible.
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