A big step _____ to strengthen China's h
题型:选择题
问题:
A big step _____ to strengthen China's health care systems since we launched an effort in 2008. |
A. has been taken B. is being taken C. was taken D. had been taken |
A big step _____ to strengthen China's health care systems since we launched an effort in 2008. |
A. has been taken B. is being taken C. was taken D. had been taken |