He hasn't slept at all for three days. __________ he is tired out.
We have no idea what ____ the sports exercises will have _____ human body in the future.
In the time of economic crisis, every coin _________ a lot.
--- Miss Yuan, you promised!--- Well, ____________. But it was you broke your word first.
Joan spent as much time as she ________ me with my maths while I was in China.
--- We haven’t heard from her for a long time.--- What do you suppose _________ to her?