None of them could understand your meaning ?A. could theyB. didn’t heC. do theyD. could i

问题补充：

None of them could understand your meaning, ?

A. could they

B. didn’t he

C. do they

D. could it

答案：

(答案→)A. could they

B. didn’t he

C. do they

D. could it

解析：本题是反义疑问句，前句表示否定的意思，故后句用肯定的结构，本题用情态动词could，人称为复数，故后半句的结构为could they，故本题选A。