20. Don't forget to lock the door.
느리게 읽기 빠르게 읽기 Don't forget to lock the door. Be sure to lock the door. Be sure to call me. ☞ Be sure to ~ Don't forget to vote. Don't forget to call me. Did you forget to return his call? ☞ Did you forget to ~ Don't forget to feed the baby. Don't forget to buy some coffee. Don't forget to turn off the lights. Please don't forget to vote. Please don't forget to brush your teeth. Don't forget to +..