18. Confronted with mounting drug prices, particularly the synthetic petrochemical derivatives, some Western chemists are turning their attention to herbs used for many centries in African and Asian medical practice.
(B) drug prices, particularly the synthetic drugs derived from petrochemicals
(C) drug prices, in particular the synthetic derivatives from petrochemicals
(D) prices for drugs, in particular the synthetics derived of petrochemicals
(E) prices for drugs, particularly the synthetic drugs derived from petrochemicals
answer is E, confused by A, how to correct it? 求教了 |