下列词语中画线字的注音，无误的一项是（ ）

I phoned you at 5:00 yesterday afternoon, but nobody answered me.-Sorry. I ______ the flowers in the garden at that time.

(2013·江苏南通市二模)We ________ have hurried all the way to the airport — the flight was called off because of the foggy weather.

Joining the firm as a clerk, he got rapid promotion, and ________ as a manager.

know, it is our duty to _________ my youngersisters from being hurt when they are in trouble.