you heard about the recent election—Sure, it ________ the only thing on the news for the last three days

Why are you so late?—I was in half the way when it______to me that I had left my notebook home，so I had to fetch it

下列句子中加横线的成语运用恰当的一项是（ ）

What are you going to do this afternoon? — I will probably play computer games ________ my parents are out.

Mother often encourages me that there is nothing difficult in the world that I can ________. [ ]