It was not long before a helicopter arrived. It arrived_______
D. much later
Chọn đáp án B
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_______ every industry in our modern world requires the work engineers.
He used to live five kilometers from school and ride a bicycle to school everyday. Last month his family moved to the school neighbourhood. He now walks to school. He_______ rides a bicycle to school.
_______ of the two boys went on a picnic yesterday. They _______ stayed home and watched the Omlypic games on TV.