Up to now there have been many explanations _____

In recent years there has been a ______ increase in the cost of living; many families have

Now many farmers have reverted to traditional farming methods, ______ their ancestors way

I have to go now. I have to pick _____my son from school.A.inB.withC.up

Many of our men are off work with colds just now. We have been______with a skeleton staff.

Hurry up, or the tickets______out by the time we get there.A．will have been soldB．will sel

There have been many _________ in their marriage but they still love each other.A. bac