Sentence examples for it's difficult to know from inspiring English sources

It's difficult to know what Mick's up to when you can't even see him.

It's difficult to know".

"It's difficult to know what's going on".

But it's difficult to know for sure.

It's difficult to know any more.

It's difficult to know who would be less flattered.

It's difficult to know what to ask a rapper.

But, she conceded, "it's difficult to know the exact number".

It's difficult to know where to start with Couples Retreat.

It's difficult to know now where the bottom is.

It's difficult to know how to categorise such an enterprise.