--- Daddy, I don’t want to go to Jimmy’s birthday. --- You had better go. ____ you make a promise, you have to keep it.
The two things are the same in outward form but different _____.
_____ 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.
_____ inviting guests and not treating them properly!
With sufficient scientific information a manned trip to Mars should be _____.
The generation _____ makes it difficult for parents to understand their children's opinions.