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

The water was left running all night long.— Yes. It seemed that John . He was the last one to leave the lab.

I’m looking for a place________trees grow in water．

He transplanted the rare flowers to the botany garden_______it was the best time for them.

In the plane crash accident, the chance of the pilots’ survival is ______.