更多"Since the beginning of the 21 st ce"的相关试题:
[单项选择](Since the beginning) of this century, more and more scientists (have become) interested (in) (the way how) the human brain works.
A. Since the beginning
B. have become
C. in
D. the way how
[单项选择]Since the Great Depression, the United States government has protected farmers from {{U}}damaging{{/U}} drops in grain prices.
A. slight
B. surprising
C. sudden
D. harmful