“You can’t have your football back ____ you promise not to kick it at my dog again,” the woman said firmly.

We must get up early tomorrow，______ we’ll miss the first bus to the Great Wall．

Let’s have a talk over this matter this afternoon, or __________ it is convenient to you.

_______ the house is empty, memories flood my mind of a time when it was filled with life.

_________he had only practiced the part a few times; he did it successfully beyond expectation.