Перефразировать,употребляя пассив:
10) We won't repeat that mistake in future. 11) A discussion will follow the lecture. 12) They are interviewing the delegates. 13) What are they building over there? 14) We were taping the lesson when you phoned
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10) That mistake won't be repeated in future. 11) The lection will be followed by a discussion. 12) The delegates are being interviewed by them. 13) What is being built up over there? 14) The lesson was being taped when you phoned