| A．are | B．was | C．am | D．is |
( )| A．litter |
| B．spit on the ground |
( )| A．ask questions actively |
| B．be quiet |
( )| A．Don’t get up late in the morning. | B．Don’t go home late at night. |
( )| A．keep the room clean |
| B．make a mess |
( )| A．make noise |
| B．eat in class |
( )| A．pick flowers | B．keep off the grass |
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