25.With so little time ______ on math, it is all too easy for children to ignore practicing mathematics, which is a kind of language.
I have kept that portrait _____ I can see it every day, as it always reminds me of my university days in London.
The ability to store knowledge makes computers different from every other machine _____ invented.
_____ quite recently, most mothers in Britain did not take paid work outside the home.
I’ve already told you that I’m going to but it, _____.
You will want two trees about ten feet apart, from ______ to suspend your tent.