Passive needs be + past participle (was requested, had been overwhelmed)

This type of question, asked 2 times: 13 Sep 2024 S3, 26 Sep 2024 S3. All 2 questions below, oldest first.

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Question 1
13 Sep 2024 S3
95 $Parts of the given sentence have been underlined. Identify the part that has an error. Select 'No error' if there is no error. Although the team had trained diligently for months, they had still overwhelmed by the opponent's unexpected tactics.$
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Question 2
26 Sep 2024 S3
94 $Select the most appropriate option that can substitute the underlined segment in the given sentence. If no substitution is required, select ‘No substitution’. The chief guest concluded his speech as he requested to stop by the organisers.$
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Question 1