The celebration of Valentine's Day became unfashionable in the ______ century. 2022-01-06 The author suggests that the benefits of women's working ______. 2022-01-06 A: I noticed a copy of Scientific American on your desk. May I borrow it？ B: ______ 2022-01-06 A．Audio 2022-01-06 Batteries are not an ideal energy source for sensor networks because they ______. 2022-01-06 A: I heard you've had your book published. Congratulations! B: ______ 2022-01-06 Your grade will be based in large part on the originality of your ideas. 2022-01-06 What did psychologists find out about Clever Hans？ 2022-01-06 Busing cutbacks may eventually lead to ______. 2022-01-06 Which of the following characterizes aggressive driving？ 2022-01-06