问题
选择题
Scientists are hoping for a _____ in the search for a cure for cancer.
A.breakthrough
B.break
C.deal
D.progress
答案
答案:A
考查名词:A. breakthrough 突破B. break休息C. deal交易 D. progress 进步,句意:科学家希望在研究癌症的疗法上能有突破。选A。