GRE Text Completion: ETS Fundamental-GRE填空ETS基础 - 6N0TCCIAN0177Y_7X

Manipulating laboratory tissue cultures with hormones is one thing; using hormones to treat human beings, however, is contingent on whether hormones that (i)____________ in the laboratory can affect (ii)____________ organisms, and in predictable ways. A. fail B. esoteric C. work D. cellular E. reproduce F. whole