【题目】Jack is a great talker. It's high time that he something instead of just talking.
A. will do
B. has done
C.do
D.did

【答案】D
【解析】句意：jack很健谈，到他做事而不只是说的时候了。在句型 “It's high/ very time that…”中， 从句中的谓语动词用did或should do.所以选D项。