With the college entrance examination near, both the parents and the students are more and more anxious.
They are good friends. _______ is no wonder that they know each other so well.
Does ________ matter if he can’t finish the job on time?
— I don’t know whether I should go abroad or not, Mum. — I leave _______ to your own judgment whether you should do it.
It used to be thought _____ the Earth was flat.
Energy is ____ makes one work.