Jack is a great talker.It's high time that he something instead of just talking.(·辽宁

问题补充：

Jack is a great talker.Its high time that he something instead of just talking.(·辽宁)

A. will do

B. has done

C. do

D. did

答案：

A. will do

B. has done

C. do

(答案→)D. did

解析：句意：Jack总爱夸夸其谈，他该做点事了，而不是仅仅空谈。这里是“Its (high/about) time that...”句型，从句谓语应用过去式或“should＋动词原形”。