【单选题】Teachers devotes themselves _the cause of aducation.
【单选题】下列哪种氨基酸为嘌呤和嘧啶核苷酸生物合成的共同原料
【单选题】Without their help, She _____ in passing the entrance examination.
【单选题】下列哪种氨基酸为嘌呤和嘧啶核苷酸生物合成的共同原料?
【单选题】系统日常管理主要是( )
A.
使信息系统在一个预期的时间内能正常发挥其应有的作用,产生其应用的效益。
【单选题】I don’t think ____ possible to finish the task without their help.
【单选题】Without their help, we _________the program in time.
D.
could not have finished
【单选题】You ____ your work ahead of time without their help.
B.
wouldn’t have completed
D.
shouldn’t have completed