A simple 45-minute operation by scientists is hoped to cure blindness in six years.
A. being developed B.developed C. to develop D. developing
A simple 45-minute operation by scientists is hoped to cure blindness in six years.
A. being developed B.developed C. to develop D. developing
A
考查非谓语动词的用法。此处现在分词的被动式作定语，表示动作正在进行。句意：科学家们正在研发的一种简单的45分钟的手术有望在6年后治愈失明。