【已刪除】People may express their feelings differently on different occasions. Cultures sometimes vary greatly in this regard. A group of researchers in Japan, _____16_____ , studied the facial reactions of students to a horror film. When the Japanese students watched the film _____17_____ the teacher present, their faces showed only the slightest hints of reaction. But when they thought they were alone (though they _____18_____ by a secret camera), their faces twisted into vivid mixes of anguished distress, fear, and disgust. The study also shows that there are several unspoken rules about how feelings should be _____19_____ shown on different occasions. One of the most common rules is minimizing the show of emotion. This is the Japanese norm for feelings of distress _____20_____ someone in authority, which explains why the students masked their upset with a poker face in the experiment. 【題組】16. (A) as usual (B) in some cases (C) to be frank (D) for example