Please return in an hour. I'll be ready ______ then.
A.till
B.by
C.at
D.on
I′ll never forget the day ____ I became a doctor.
A.that
B.which
C.where
D.when
I'll get it for you ______ I could remember who last borrowed it.
A.on condition
B.as far as
C.if only
D.lest
I'll lend you my cassette recorder ______ I've done with it.
A.every time
B.the moment
C.until
D.lest