Maybe there are some things among the girl’s papers, like her school reports, old photos and so on. Can you ______ them and give me whatever you find?

A．turn to

B．set down

C．go through

D．subscribe to

半导体激光器（LD）的主要适用于（）的光纤通信系统。

A.长距离大容量

B.短距离大容量

C.长距离小容量

D.短距离小容量