В пассивный залог 1)He has made a number of important experiments in this laboratory.
2)Livingstone explored Central Africa in the 19th century

Question

Английский язык: В пассивный залог 1)He has made a number of important experiments in this laboratory. 2)Livingstone explored Central Africa in the 19th century

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Number of important experience was made by him in this laboratory Central Africa was explored by livingstone in the 19 century...