GRE Text Completion: JiJing 1373-GRE填空机经1373题 - K6225YT14ZGG7U1TA

The book brings together many valuable reports on conservation projects, but with less variety than might have been wished: nearly half the contributions are from the same state, and consequently, the case studies are similarly ____________ geographically. A. polarized B. classified C. targeted D. circumscribed E. organized F. restricted