1)Scarcely had the apartament been swept... the cleaners were enveloped in a cloud of dust.
a.than b.when c.then d.while
2)The conductor decided...playing this piece of music one more time as the musicians were really tired.
a.on b.against c.for d.with
3)Have you ever heard Christine (to complain) about the misfortunes she has gone through?
a.complain b.to complain c.to have complained d.being complained