Doctors strongly recommended that my father more exercise regularly instead of sitting sti

问题补充：

Doctors strongly recommended that my father more exercise regularly instead of sitting still before a computer all day long.

A. takes

B. take

C. took

D. had taken

答案：

A. takes

(答案→)B. take

C. took

D. had taken

解析：句意：医生强烈建议我爸爸经常锻炼而不是整天坐在电脑前面。主句的谓语是recommend，宾语从句的谓语要用虚拟语气（should do），should可以省略，所以选B。