Perhaps the day will come ____ people will be able to breath

Perhaps the day will come ____ people will be able to breathe clean air in city.A.when B.while C
Perhaps the day will come ____ people will be able to breathe clean air in city.
A.when B.while C.as D.since
.He’s the man ______ I supposed was capable of doing such a thing.
A.to whom B.of whom C.who D.whom
7.All members ______ are admitted to the auditorium.
A.have got tickets
B.that had got the tickets
C.that have got the tickets
D.who have got the tickets
9.Writers can accurately describe objects ______ have never seen.
A.who B.if they C.they D.that
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