When you are reading fast, your eyes will be one or two word groups ahead ___your mind is taking on. 

My watch works very well. There is _______wrong with it.

Mum, I need a new schoolbag. Could you buy _______ for me tomorrow?

I don't think _________ possible to master a foreign language without much memory work. 

—Which of those electronic dictionaries do you like most? —        . They are both expensive and of little use.