Common Error Detection
Find out whether there is any grammatical error in below sentence.They could have / helped him / had they approached by him / for help well in advance.

for help well in advance
helped him
had they approached by him
No error
They could have

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Common Error Detection
Find out whether there is any grammatical error in below sentence.The method suggested in the lecture / enables a student to learn more quickly / and to have remembered for a longer period of time.

The method suggested in the lecture
No error
and to have remembered for a longer period of time
enables a student to learn more quickly

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