Question : The following sentence has been divided into parts. One of them may contain an error. Select the part that contains the error from the given options. If you don't find any error, mark 'No error' as your answer.
The students looked confused, / so the teacher / explain the topic again.
Option 1: explain the topic again
Option 2: so the teacher
Option 3: No error
Option 4: the students looked confused
Correct Answer: explain the topic again
Solution : The first option is correct.
Replace explain with explained to correct the sentence. The sentence is written in the simple past tense. So, we should use the past participle form of the verb in the past tense. The verbs looked and confused are in the third form of the verb.
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