________ is known to us all is that Antarctica is thecoldest place on Earth.

After a long walk in the sun, they wanted to drink .

I wonder how it ____ that Chinese climbers successfully finished the torch relay on the Mount Qomolangma, where the air is so thin.

The boy was badly ill．He had to drop out of school because of________．

－Is a new modern gym being built in our city now ?－Yes, and it ____ next year