1.they used to drink beer for breakfast in england years ago.
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2.someone might have sent the letter to the wrongaddress.
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3.they were cleaning the floor when I arrived.
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4.they are going to steal your money if you'r e not careful.
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5.alan's knowledge of art doesn't impress me .
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6.how do people make candles ?
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7.they can't make tea with cold water.
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8.when is someone going to announce the results of the contest ?
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9.nobody informed the police that there had been a mistake.
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10.where will your company send you next year ?
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11.who looked after the children when you were away?
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12.look! someone is feeding the seals.
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13.kathy had returned the book to the library.
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14.by this time tomorrow,the president will have made the announcement.
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15.the pollution in the city was affecting people's breathing.
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16.Mrs andrews hasn't signed those papers yet.Has Mr andrews signed them yet?
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17.Is a student pilot flying that airplane?
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18.where did they hold the 1988 olympic games?
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19.do they make those tractors in this country , or do they import them?
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