1.Who's a girl on the bike?
a 改为 the
2.I don't like the pen on the desk.
对.
3.I've waited for you for a hour.
a 改为 an
4.This is mt a nice toy plane.
去掉my 或者a
5.Don't read in the bed.
去掉the
6.A moon is round today.
A 改为 The
祝你学习进步,更上一层楼!(*^__^*)I've waited for you for a hour.a 改为 an，为什么改an？？？hour 开头的是元音音素，所以用an。