Camel racing in the Arabian Peninsula is an example of a tradition that __43_ both a social and a scientific institution. Wealthy
sheikhs provide financial support and prize money that __44__ Bedouin owners of racing camels, as well as their trainers and jockeys
of secure futures without their having to forsake their nomadic way of life. ___45__, owner sheikhs, competing coming themselves,
have transformed the sport. Today it is an institution as organized and as scientifically sophisticated as horse racing is elsewhere.
Camel clinics, fitted out with the latest available technology, have been established. Veterinarians are employed to provide care and
treatment for the camels, both at the clinics and in the Bedouin camps. They also conduct sophisticated research: on embryo
transplants, on the cross-breeding of different camel strains, and on the development of training techniques based on studies of the
camel’s physiology. The sport succeeds, therefore, in __46 past and present, both by supporting the nomadic way of life and by
promoting scientific research.
【題組】43. (A) has evolved into (B) evolving into (C) is evolving into (D) had been evolving into