Who did the teacher ________ the exercises?
A. have done B. have do C. had done D. has done
Who did the teacher ________ the exercises?
A. have done B. have do C. had done D. has done
B
句意为：老师让谁做这个练习？have sb. do sth. “让某人做某事”，故只有B项符合题意。