TOEFL Grammar - Find the error

ScottsEnglishScottsEnglish Administrator Posts: 1,296 admin ✭✭✭✭✭✭✭
edited June 2017 in TOEFL Test

Find the error in the underlined words in the following sentence:

A neurological CAT scan has been running several times, but the results continue to be inconclusive.

A. neurological
B. has been running
C. the results
D. to be inconclusive

Click here for the right answer:

A neurological CAT scan has been run several times, but the results continue to be inconclusive. 

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