1. The school choir on the open day was very nice.<br />2. It's Sunday today, don't enter the center.<br />3. Please wash your hands before you have meals.<br />4. You can buy different kinds of fruits at the fruit store.<br />5. The students are having a picnic in the park.<br />6. The list are having a picnic in the park.
B. 
C. 
E. 
F. 
