党员干部的自律应常态化，加强自律所反映的哲理是

A．内因和外因在事物变化中同时存在，缺一不可

B．外因必须通过内因才能起作用

C．正确的意识指导能促进事物的发展

D．内因是事物变化发展的根本原因

根据句意，用括号内所给动词的适当形式填空。

小题1:More than one person_________(clean) the classroom at 6 o’clock yesterday.

小题2: — Is London the first European city _____(hold) the Olympic Games?

—No, it has been held in many other places in Europe.

小题3:Not only the students but also the teacher _________(ask)to go to school on time now.

小题4: She __________ (live) in this city for years when I met her in 1990.

小题5: People should save electricity by ________ (not leave) lights on when they are not needed.