Rewrite the sentences

11.  Columbus discovered America.
12.  She gave me these flowers.
13.  Jose has washed his car.
14.  Nguyen Du wrote Kieu story.
15.  They grow corn in India.
16.  The cat is going to catch the mouse.
17.  Mary bought this book yesterday.
18.  They feed these animals twice a day.
19.  George was doing the homework 8.00 last night.
20.    They often had parties on weekends.
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