Students fill in the blanks with prepositions of time (in, on, and at). Explanations are given.
A blue father and his orange child live in a city where everyone else is dull and colourless. The father goes to work every day, becoming just as dull and grey as everyone around him. The father sends his exuberant lively child to school, where the teacher tries to make him just as dull and lifeless as the rest. The father sees that his child is losing the colour that made him special, and skips work to play and imagine with his child, bringing them both back into full colour.
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