Some women _      _ a good salary in a job instead of staying home, but they decided not to work for the sake of the family．

I was really anxious about you. You _____ __ home without a word. 

If the wound ______ become infected, do not hesitate to call me.

 If human beings had been a bit less greedy and cruel, more birds and animals _______dying out.

—Did Jim come?—I don’t know. He _______ while I was out.