wait macro instruction

例句：

1. 1. I have to wait for my friend to finish his homework before we can go out.
   我必须先等我的朋友完成他的作业，我们才能出去。
2. 2. The patient had to wait for hours before the operation was performed.
   病人不得不等了几个小时手术才进行。
3. 3. She waited patiently for her turn to speak.
   她耐心地等待轮到她发言。