Give her my best regards,____
A. should you see her today
B. if you saw her today
C. if you would see her today
D. should you have seen her today
答：A
译：万一今天你见到她的话,请代我向她致以最美好的问候.
析：Should you see her today =If you should see her today, 是虚拟语气.虚拟将来,通过倒装省略if.