1.The teacher has written some new words on the blackboard.
2..I have finished my homework.
3.They haven't had lunch.
4.4.I haven't done my homework.
确保全对
1.The teacher has written some new words on the blackboard.
2..I have finished my homework.
3.They haven't had lunch.
4.4.I haven't done my homework.
确保全对