There might be life on other planets, but so far scientists haven't found enough ________ to prove it.

 Judging by her _______, Jane must be a southerner.

 I’m trying to break the _________ of talking in class.

--Mum, I’m going to visit my uncle. What about staying there a week?--A week is too long. Try to be back in a _____ of days.

There is a(an) ______ that more graduates choose teaching as their permanent careers.