Mr. Cooper asked us to stop . So we stopped to him at once .
A. talking ; listening
B. to talk ; listening
C. talking ; to listen
D. to talk ; to listen
网友回答
A. talking ; listening
B. to talk ; listening
(答案→)C. talking ; to listen
D. to talk ; to listen
解析：stop to do sth.表示“停下来去做某事”，stop doing表示“停止做某事”，本句的意思是“库伯先生让我们停止说话。也因此我们立刻停下来听他讲课。”所以本题选C。