If you want to see a doctor, fix the date with him ahead of time. This is a common ___________ in the USA.A. habit B. law C. rule D. custom
I didn’t mean to hurt you.What I meant was that you ______ have spoken to him like that.
You ______ worry about their safety.They are old enough to take care of themselves.
We should make full use of whatever happens to us.There is always____ to learn from every experience.
------ Could you please tell me ______? ------ It’s next to the post office.
March is _____ month of the year.