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  • "By the year 2020, linguists ________ and _____ the Indo-European language family for more than 200 years.
Question 1:
"By the year 2020, linguists ________ and _____ the Indo-European language family for more than 200 years."
A. "shall have been studying, defining"
B. "will have been studying, defining"
C. "may have been studying, defines"

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Tenses Practice 62 - English Tenses Practice