1.   A. Probably the spring has sprung and there is no tension to hold it up.

2.   Spring has sprung and I have not.

3.   Spring has sprung.

4.   Spring has sprung,

5.   Spring had sprung.

6.   Spring has sprung!

7.   Spring has sprung in the fall.

8.   Spring has sprung with new spiral-bound cookbook formats from Chronicle Books and Clarkson Potter.

9.   Take it out of the door and take it apart to see where the spring has sprung.

10.   Spring has sprung, or so the calendar says.