[解析]
(1)A.细节理解题。根据第一段中的I noticed him because not many people wear a jacket and tie in the middle of a hot summer day,and I had already seen this man four times that afternoon.(我之所以注意到他,是因为在炎热的夏日里穿夹克打领带的人并不多,而那天下午我已经见过这个人四次了。)可知跟在作者后面的那个人的奇怪之处在于他似乎穿得太多了。故选A。
(2)A.细节理解题。根据第三段中的When I saw a taxi coming,I jumped into it.As I was telling the taxi driver where to go,I found the man get into another taxi,which then followed mine.(当我看到一辆出租车开过来时,我跳了进去。当我告诉出租车司机要去的地方时,我发现那个人上了另一辆出租车,它随后跟着我的车。)可知当作者上了一辆出租车,那位陌生人也上了一辆出租车,故选A。
(3)C.细节理解题。根据最后一段中的.I asked him why he was following me.At first he said he was not following me at all,but when I threatened to call the police,he admitted he was.(我问他为什么要跟踪我。起初他说他根本没有跟踪我,但当我威胁说要报警时,他承认了。)可知作者说他要报警,然后那个陌生人承认跟着作者,故选C。
(4)D.细节理解题。根据最后一段中的He then told me that he was a journalist(news reporter) and that he was writing an article on how elderly people in Singapore spend their time.He said he was observing me to gather materials for his article.(然后他告诉我,他是一名记者(新闻记者),他正在写一篇关于新加坡老年人如何打发时间的文章。他说他观察我是为了给他的文章收集素材。)可知陌生人跟随作者是因为他是一名记者,需要写文章的材料。故选D。