作为和伽利略同时代的科学家，达尔文发展了“物竞天择，适者生存”的生物进化论学说。[ ]
误
Tom put his heart into the wildlife research, and finally, his efforts ________ him great success and fame.[ ]
A. saved
B. earned
C. made
D. offered
运行中的检漏保护装置，每（）至少做一次运方人工漏电试验。
A.周
B.月
C.半年
D.年
