Final answer:
The sentence "A machine mixes the concrete with water." is the best example of a lively and active voice.
Step-by-step explanation:
The sentence "A machine mixes the concrete with water." is the best example of a lively and active voice. This sentence is in the active voice because the subject (a machine) is performing the action (mixing the concrete with water). The active voice makes the sentence more lively and engaging for the reader.
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