exercises of preposition in, on, at

1	I'm leaving ... June 12th.
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2	The company was founded ... 1963.
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3	John joined the company ... March.
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4	The train arrives ... 10.05.
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5	The meeting is ... the morning.
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6	He arrived ... Tuesday afternoon.
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7	The staff meeting is ... Friday morning.
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8	He phoned me ... half past six.
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9	We plan to start production ... the summer.
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10	Phone me ... lunchtime.
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11	The children start school ... 8.30.
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12	We're going skiing ... Christmas.
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13	We went to the cinema ... Wednesday evening.
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14	England is very cold ... the winter.
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15	I met him in New York ... February.
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16	We sent the order ... March 10th.
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17	The meeting finished ... midnight!
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18	I start my holidays ... July 14th.
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19	We are going to California ... August.
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20	The factory was opened ... 1987.
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