—How did you like the concert last night ?
—I enjoyed it very much, but the dancers a better job．
A. could have done
B. must have done
C. could do
D. had done
网友回答
(答案→)A. could have done
B. must have done
C. could do
D. had done
解析：考查情态动词用法，根据句意可知此处为情态动词的虚拟用法，表示对过去的虚拟，所以排除CD。A意为本可以干某事 B，意为一定做了某事
句意为你感觉最晚的音乐会怎么样？----我很喜欢，但是如果舞蹈演员本可以调地更好些。