He asked them to come to his office one _____.

How long has the train been away?—Sorry. I don’t know. By the time I got here, the train ________.

When shall we meet again, next Saturday or Sunday? —– _________ day is OK. I will be free next weekend.

When you are sleeping, you had better _____ all your windows closed. [ ]

.On the contrary,I think it is Tom,you,to blame.