—How often do you eat out ?—____________, but usually once a week.
Only after ___ your homework _________ watch TV.
She ____ an old friend of hers yesterday while she was shopping at the department store.
All possible means ____, but nothing can prevent the buildings ____.
Gun control is a subject _________ Americans have argued for a long time..
Such a grammar mistake is _____ among the beginners of English study.5.