At the dairy factory, the centrifuge separated the cream from the milk.
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Answer:
The children sailed paper boats before dinner.
Mothers call the children inside when dinner is ready.
She fell while she was playing and injured her knee.
Explanation:
Prepositional phrases are composed at least of a preposition and an object.
The word 'when' used as a conjunction means 'at the time that', and is followed by a subordinate clause.
The word 'while' is used to connect two events occurring at the same time, and is followed by a subordinate clause.
Answer:
by broadcasting picture of such events
explaining the effect and solution
The answer is A, because numbers with two parts should be hyphenated
