One third of our work--- finished.

A had
B has been
C were
D have been

Correct Answer: has been

Subject অংশে fraction (ভগ্নাংশ) থাকলে পরবর্তী noun অনুযায়ী verb ব্যবহৃত হয়। এখানে work একটি uncountable noun.
Bissoy MCQ

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One-third of our work-finished.

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