(C)
         If you often stay in contact with friends through social networks, you’re not exceptional. However, while social networks make __36__ easy for people to keep in touch, they have a few harmful effects. For example, you can easily "unfollow" or "unfriend" someone __37__ a single click. This kind of rude behavior usually does not happen in real life. Relying too much on them __38__ the chances for face-to-face communication. Some people even use social networks to bully other people when they have __39__. They do so by posting __40__ words or pictures on other users’ walls.
【題組】36.
(A) X
(B) this
(C) that
(D) it