With time changing so fast, to keep _____ with time, anyone should be a lifelong learner, or he will fall behind within years. 

He made it pretty clear from the beginning that we were going to war. _____ she still pretends that she knew nothing about it?

More and more old people are skiing but it has ______ to do with snow and slopes: this type of skiing stands for Spending the Kids Inheritance.

She told her husband that she couldn’t _______ the rest of the housework without his help.

 It suddenly ________ me how we could improve the situation.