填空题 The ______ of nuclear radiation directly into electricity was an exciting possibility that was being vigorously explored in many laboratories in the 1950s.

填空题 Sixty-two and blessed with his mother’s skin, the fisherman had withstood a lifetime of exposure to the sun and looked as ______ as a man in his forties.

填空题 His supervisor pushes and motivates him in such a positive manner that he is not only able to reach but to ______ his personal goals.

填空题 He is a man with a(n) ______ business sense. He has built his initial investment into a substantial and even excessively large fortune.

填空题 French educator Louis Braille invented a simple but ______ code which has had an impact on the lives of generations of people who are blind.

填空题 I was not only shocked but also disgusted that the report tried to ______ the scientific facts in such a manner that even some highly-educated people were fooled.

填空题 The senators didn’t expect us to ask such tough questions, and when we finally did, they got ______ and didn’t know what to say.

填空题 As the gender barriers ______, the number of women working as lawyers, doctors, or bankers began to increase significantly from the mid-20th century.