It has always been the _____ of our firm to encourage workers to take part in social activities.
We had to read ______ the light of a candle because the light went out.
Young Lee learned some English when she stayed in America, and last year she ____ herself Japanese.
_______ my opinion, you shouldn’t go there by yourself.
______ the beginning of the meeting, we heard a report by Mr Li.
It’s getting late. We must "be off" now. Which of the following can’t replace the underlined part?