One of the effective ways to lessen environmental pollution is the reservation and protection of more swamps.

A．vast thick corals

B．pockets of wet land

C．warm volcanoes

D．millions of bees and wasps

—I'm still working on my project.

—Oh, you'll miss the deadline.Time is ________.[ ]

A. running out  

B. going out

C. giving out  

D. losing out