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For years, scientists _______ for a cure for Alzheimer's disease. search were search have search have searched

For years, scientists _______ for a cure for Alzheimer's disease. search were search have search have searched
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For years, scientists _______ for a cure for Alzheimer's disease.

search
were search
have search
have searched

User Slallum
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2 Answers

3 votes
the answer is -have searched-
User Ishwor Timilsina
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8.3k points
2 votes

Answer:

have searched

Step-by-step explanation:

User Alex Harvey
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8.1k points
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