GRE Text Completion: OG/PP2-GRE填空OG/PP2 - QRSRSDIL15KD025TF

Linguistic science confirms what experienced users of ASL - American Sign Language - have always implicitly known: ASL is a grammatically ____________ language, as capable of expressing a full range of syntactic relations as any natural spoken language. A. complete B. economical C. redundant D. spare E. unique F. unlimited