(2014·福建高三第二次联考)China’s labor supply will continue to rise，despite the fact that the working­age population________

What’s this—It’s ________.

Don’t read in the sun. It’s ______ your eyes.

The Green Corporation donated the property to the state of California, with one condition _____ the Green family would be allowed to use it when they wished. [ ]

It was ______ that they all went swimming in the river. [ ]