They had to_________ before they finished the course because they were not well disciplined.
With the change of the economic foundation the entire immense superstructure is _____ rapidly transformed.
Her skirt had been so _____ in packing that she had to iron it before going out.
Some people either _____ avoid questions of right and wrong or remain neutral about them.
If he refuses to _____ my plan, I can probably find someone more cooperative.
In my opinion, you can widen the _____ of these improvements through your active participation.