With more people ____ the traffic rules, our city is becoming better organized.
Scientists study ____ human brains work to make computers.
I make $2,000 a week, 60 surely won’t make ______ difference to me.
He will come to understand your efforts sooner or later. It's just a matter of.
This training program can give you a lift at work,increase your income by 40%.
In our class there are 46 students,half wear glasses.