Answer :
The correct sentence will be "We did not know about the Recycled Orchestra until we watched the video online yesterday".
- In this case, it should be noted that since the event occurred the previous day, the past tense would be used, the present tense cannot be used in this case.
- Therefore, the past tense of watch is watched. Therefore, using watched in the sentence will give a correct sentence.
In conclusion, the correct sentence will be "We did not know about the Recycled Orchestra until we watched the video online yesterday".
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