Fill each gap in the following sentences with an appropriate particle/preposition: 1.The new law on dropping litter comes....force next month. 2.I met him at the party and he asked....you. 3.Football fans went ....the rampage in the centre of Norwich last night. 4.The COVID-19 virus spreads primarily....droplets of saliva or discharge from the nose when a infexted person coughs or sneezes. 5.Local people have called for an investigation....the causes of the fire. Giải thích rõ ràng.

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