The experiment has_________ the possibility of the existence of any life on that planet, but it does not mean there is no life on other planets.
On returning home, she found a note _______ to the door, _______ “Call in later.”
Although all of the apples ________, none of them ________ good.
Such good use had been his spare time_________ his English has improved a lot.
Was it from Libya ______ wars suddenly broke out _____ we managed to rescue the Chinese working staff?
Medicine should not be kept where it is _______ to children.