With time changing so fast, to keep _____ with time, anyone should be a lifelong learner, or he will fall behind within years.
However busy he is, he will ____ some time for exercise every day.
. — I reminded you not to forget the appointment with the house agent. — ____, but I was caught in a traffic jam.
Failure is never pleasurable, but it can make a positive contribution to your life ____ you learn to use it.
We all know that, ____, the situation will get worse.
The most important thing for Lucy is to find a proper job,____ in which she can bring her ability and potential into full play.