I spent long enough in teaching. Because teachers to teach their respective queues. Since there are several groups of friends to teach kids like me. By the time I have to teach. I'm quite worried
I spent some time in teaching Teachers to teach the different queues, respectively, because there are many friends who wanted to teach kids like me. When it's time for me to teach I'm somewhat concerned
I spent some time in teaching because teachers teach in order to sort queue, because there are so many groups that need to be taught the children like me at the time when I am teaching I must be quite worried about