单选题 One day as a teacher walked into the classroom, he heard a low voice: "Here is the teacher, I'm sure the unfair fellow (不公正的家伙) is going to talk about putting in commas. "It was Bill's voice. He was talking with the boy next to him. The teacher didn't get angry. He said nothing about it but he began, to talk about putting in commas, and then he wrote on the blackboard the sentence: "Bill says the teacher is an unfair fellow." The class laughed and Bill's face turned red. "Now," said the teacher, "I'll show you how important commas are." He put two commas in the sentence, and read, "Bill, says the teacher, is an unfair fellow./

单选题 The story happened ______ a classroom.
【正确答案】 A
【答案解析】[解析] 由文中第一句话可以知道是在教室里。
单选题 Which of these sentences is true?
【正确答案】 C
【答案解析】[解析] 由文章可以知道，老师听到了学生说的话，但是并没有生气，所以前两项的说法是不正确的。
单选题 Bill's face turned red because he knew ______ heard what he said.
【正确答案】 C
【答案解析】[解析] Bill的脸变红，是因为老师把他说的话又重复了一遍，他知道老师听到他说的话。
单选题 The word" comma" means ______ .
【正确答案】 B
【答案解析】[解析] 由文中最后一句话，可以知道comma的意思是“逗号”。
单选题 From the story we can see the teacher was ______ .
【正确答案】 B
【答案解析】[解析] 老师听到学生说他的坏话，不动声色地使这个学生感到不好意思。