The last decade of the 21st century ________ the rapid, steady development of China in various fields.
Are you still here? You ______ home hours ago.
As she’s not here, I suppose she _____ home.
You _____ him the news; he knew it already.
You _____ practise the drums while the baby is sleeping.
The police still haven’t found her, but they’re doing all they _____.