Any 后面应该跟singular or plural?

比如，
any question or any questions?

所有跟帖： 

• zt. but secret in it -走马读人- ♂ (184 bytes) () 05/07/2015 postreply 12:33:25

• Thanks 走马读人 for sharing:) -南山松- ♀ (0 bytes) () 05/07/2015 postreply 16:34:21

• checked on the internet, here is what I got -马下人- ♂ (566 bytes) () 05/07/2015 postreply 20:21:04

• 没有绝对，要见机行事 -郁金香花园- ♀ (0 bytes) () 05/07/2015 postreply 22:35:05