One way to species under' threat of extinction - whatever the cause - is to remove them to zoos and parks and breed them there.
The police are trying to find out the ________ of the man killed in the traffic accident.
There are only ten minutes left; can we walk ___________?
The days are gone ________ we could leave our door unlocked at night.
People _______ the dead person was related would make paper-cut offerings on special days.
—How could you________ my mother so easily in the crowd? —Because she stood out in her red dress.