Listen, a small number of students in the classroom.
A. talk
B. talks
C. is talking
D. are talking
网友回答
A. talk
B. talks
C. is talking
(答案→)D. are talking
解析：根据a small number of students“少量学生”作主语可知，其后的谓语动词应该用复数形式，故应该排除BC；又根据listen可知，本句的时态应该是现在进行时。所以本题选D。