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5 votes
. Modern zoos are very different from zoos which ________ fifty years ago.

A. were built B. was building C. to be built D. building

2 Answers

4 votes
The answer is A - were built

Step-by-step explanation:

Fifty years ago suggests that it was built in the past. Therefore “we’re built” is the grammatically correct answer.
User Volingas
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4 votes

Answer:B

Step-by-step explanation:

User Quartz
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