_____is compulsory by law for a citizen to undertake military service.
The part he _____ in the movement was important.
You have advised her not to have breakfast in order to stay slim, and this is _____ I disagree about.
The old pianist would listen to our repeated request that he _____ in public again.
What _____ of English Xu Gehui _____!
The teacher commanded that the exercises _____ in an hour.