—John has put forward ________ most challenging question for us to answer.—Yes,it really is.I have never heard ________ harder one.
Little Tom tiptoed quietly to the bird, but ______ into the forest when he was about to catch it.
I went to see Professor Johnson, only ______ that he had left the city the night before.
Joining the firm as a clerk, Peter got rapid promotion, and ______ as a manager.
I am ______ about what I say because careless remarks are likely to hurt others’ feelings.
The storm came so suddenly, otherwise they ______ such great loss when it struck.