<em>Answer:</em>
<em>1 . On returning home, Peter discovered </em><em><u>by</u></em><em> his horror that the pipes had burst and the house was flooded</em>
<em>A. to</em>
<em><u>B. by</u></em>
<em>C. of</em>
<em>D. at</em>
<em>2. That building, </em><em><u>was severely damaged</u></em><em> by the storm, has to be torn down</em>
<em>A. severely damaged</em>
<em><u>B. was severely damaged</u></em>
<em>C. that was severely damaged</em>
<em>D. which severely damaged</em>
<em>Hope this helped you!</em>
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