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TOEFL / IELTS Grammar - Find the error
ScottsEnglish
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in TOEFL Test
Find the error in the underlined words in the following sentence:
The scientists wondered if someone discovered the reaction before them, so they searched through all of the available research documents.a. wondered if
b. someone discovered
c. so they searched
d. research documents
Click here for the correct answer.
The scientists wondered if someone had discovered the reaction before them, so they searched through all of the available research documents.
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