选词填空,从方框中选择合适的单词填入句子,每次只能用一次(答案必须是大写字母) A. frequently B. original C. thesis D. memorize E. frequency F. solution 1. Both sides are trying to find a ______. 2. His speech was _______ interrupted by stormy applause. 3. He was awarded his PhD for a _______ on industrial robots. 4. The boy is very clever. He can _______ the words in ten minutes. 5. I can read Shakespeare in the _______. 6. He added: "We have to look at the _______ of events."