最近,我听到一个关于一位著名科学家的故事,他在医学领域曾有过十分重要的突破。
A: Irecentlyheardastoryaboutafamousresearchscientistwhohadmadeseveralveryimportantmedicalbreakthroughs.
B: Irecentlyheardastoryaboutafamousresearchscientistwhomadeseveralveryimportantmedicalbreakthroughs.
A: Irecentlyheardastoryaboutafamousresearchscientistwhohadmadeseveralveryimportantmedicalbreakthroughs.
B: Irecentlyheardastoryaboutafamousresearchscientistwhomadeseveralveryimportantmedicalbreakthroughs.
