课时规范训练(三十)
Ⅰ.完形填空
Saving the Northern White Rhino
Meet Sudan. He is a northern white rhinoceros, a rare subspecies of white rhino. But he's not just any northern white rhino. He is the only male northern white rhino left in the world—and one of only five northern white rhinos __1__ today.
That means Sudan, 42, is the subspecies' last hope for __2__ extinction.To protect him, officials have placed him __3__ 24hour armed guard in central Kenya. Sudan lives there with two __4__ northern white rhinos，Fatu and Najin. The other two northern white rhino females are in different zoos. No northern white rhinos are left in the __5__.
