Improve the bracketed part of the sentence.
The duo’s network was (made to learn identify) true signals using previously vetted signals; they then studied the weaker signals.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1, i.e. made to learn to identify.
- The phrase 'made to learn identify' is incomplete as it is unable to use both the verbs together in a meaningful way. It lacks a preposition to indicate the second action/verb (identify) of the sentence. Which is why it is necessary to add the preposition 'to' before the verb to complete it's meaning.