1/The dam may be broken by a sudden increase in water pressure
2/Milk is used for making butter and cheese.
3/The river bank is covered by weeds.
4/The room was filled by smoke.
5/That letter wasn't written.
6/ The White House is visited by Hundreds of people everyday.
7/This fact isn't known very well.
8/ Are the dishes washed everyday?
9/ That play was written by Shakespeare.
10/Is that lecture given by Jackson?
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