GRE Text Completion: Fundamental 24 Sets-GRE填空基础24套 - 650G7302T953VJ9M!

Once thought to be (i)____________, the dawn redwood was rediscovered in the 1940's, at which time its continued survival seemed (ii)____________; today, however, it is commonly cultivated. A. immense B. natural C. extinct D. precarious E. adaptable F. inevitable