Did you enjoy the concert?---No,it was a confusion,and the band

问题描述:

Did you enjoy the concert?---No,it was a confusion,and the band
didnt play as it___
A did
B used to
C has done
D was
选什么,其他的为什么不对?

因为原文the band didn't play as it ___ 中did是谓语,所以不能再选可以作谓语的did和was这些过去式了,又因为has done是现在完成时,如果选has done 就不能体现出是这次演奏以前的演奏,所以应该选used to
used to 意思是过去经常怎么样