C．Finding food or fruit less attractive.

　　D．Participating in almost all activities in college.

　　答案与解析：C　考查细节理解。根据文中"If you are homesick, you might notice changes in the following"下面的第三点"Increases/decreases in appetite"可知，想家的时候会出现的现象有很多，没有食欲是其中的一种。因此正确答案为C。选项D "参加大学中几乎所有的活动"与文中的"Lack of interest or involvement in new surroundings"不一致，所以是错误的。

　　2．New college students might be homesick because ________.

　　A．they are never far away from their parents

　　B．they feel upset about something unexpected

　　C．they suddenly do not have anything to do

　　D．they do not like the college they are in

　　答案与解析：B　考查细节理解。根据Causes下面的第二点"Unhappiness when things are different from your expectations of college life"可知，当事情和他们预料的大学生活不一样时而出现不开心的情绪是大学新生想家的原因之一，故正确答案为B。

　　3．Which of the following measures might be helpful for homesick students according to the text?

　　A．Keeping their old friends left behind.

　　B．Reminding themselves to keep busy and forget it.

C．Forcing themselves to stay in their dorms on weekends.