(2012年湖南卷,28)________ I always felt I would pass the exam, I never thought I would get an A.A.WhileB.OnceC.IfD.Until
—Have you heard that George quit his job? —Yeah, but I can't________why he did so.
—Tony, you must have noticed the student who broke the glass. —I'm sorry.I________attentively.
—Sorry for the delay.I got lost in the mountain. —That's OK.You're safe and that's what________.
—Tom has been fired by his boss. —________?As far as I know,he is a hardworking and considerate fellow.
Annoyed by the salesman's bad manner,John chose ________of the two computers on sale and left.