parents say and do has a life long effect on their children.
They were so far away that I couldn't _____ their faces clearly.
If the boy had _____ the dog alone it wouldn't have bitten him.
With sufficient scientific information a manned trip to Mars should be _____.
_____ inviting guests and not treating them properly!
_____ it is a good thing I did not get the post I had applied for, though I must admit that I was disappointed at the time.