"Now I'll call for a simple repair of your skates. Now you can just find a seat and sit down. " The strict coach looked at everyone and pointed to several stools beside the table.

"Oh, yes."

when we heard the coach's words, we all found seats.

"let's have a look at the roller skates on the table. The above roller skates are all the materials I didn't come to have nothing to install. Now your task is to use the tools on the table to separate the roller skates one by one. It's ten minutes in pairs. There's a pair of the ones I've disassembled on it. I'd like...