[解析]
(1)细节理解题。根据文章第一段I don't know.But when I overhear my students speaking to each other,I am often similarly confused(谈及自己经常不懂学生说的话。)及第三段中的举例One of their comments caught my ear:"Venmo it to me."I had no idea what "Venmo"meant,so I asked.(他们的一条评论吸引了我的注意: " Venmo it to me."我不知道" Venmo"是什么意思,所以我问道。说自己不懂学生的谈话Venmo it to me )可知,作者遇到了语言障碍。故选C。
(2)细节理解题。根据文章第二段Early on,when I was in my 20s and 30s,this wasn't an issue,as we were close enough in age to speak the same language.But lately I have become well aware that a language ship seems to have sailed,and I am not on board.(早些时候,当我二三十岁的时候,这并不是一个问题,因为我们的年龄足够接近,可以说同一种语言。但是最近我很清楚地意识到,一艘语言之船似乎已经起航了,而我却不在船上。)可知,自己语言障碍的原因是和学生的年龄差越来越大。故选B。
(3)推理判断题。根据文章第四段but I am uncomfortable with change when its pace has me hanging on by my fingernails.If I were to awaken from a five﹣year nap,I'd have no idea what people were talking about.I just wouldn't understand the language.(但我对变化感到不舒服,因为它的步伐让我紧抓不放。如果我从五年的午睡中醒来,我根本不知道人们在说什么,我只是听不懂他们的语言。)可知,作者认为语言变化太快了。故选D。
(4)词义猜测题。根据上文I congratulate myself on at least having the desire to know what they're talking about,as well as on my ability—for the most part—to understand their explanations.(我庆幸自己至少有渴望知道他们在说什么,也庆幸自己有能力(在大多数情况下)理解他们的解释。)及But what will happen if my interest wanes and that the language ship finally disappears over the horizon该句中的But可知,该词意思为"减退(wanes)"。A.Lessens减轻,减退;B.Grows成长;C.Happens发生;D.Maintains维持。故选A。