Chapter 1: Problem 8
By the time Spanish explorers first encountered them, the Aztecs (have developed, had developed) the calendar.
Chapter 1: Problem 8
By the time Spanish explorers first encountered them, the Aztecs (have developed, had developed) the calendar.
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Get started for freeSamantha, in addition to Carrie, Charlotte, and Miranda, (is, are) going to the beach on Saturday.
This sandwich is the only one of all the sandwiches made at the deli that (is, are) inedible.
Tom's family (is, are) considering whether there (are, is) any affordable places to go on vacation in Europe.
The Boy Scouts (love, loved) their new clubhouse, which they built last summer.
Yesterday afternoon, clouds rolled in, the sky grew ominous, and thunder (was, is) heard in the distance.
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