Is it polite to speak and laugh loudly _____? —No, I don’t think so. [ ]

I give you my word, I mean what I say, ____________ you come any nearer, I will fire.

Mr. Zhang said that he would be punctual for the appointment, _______ he were late?

Too much salt can be bad _____ your health.[ ]

Many world-famous universities names are familiar ____ Chinese students. [ ]