_____bargaining is so interesting—Sometimes it is a test to see who stand their groundfor the longest.

still have a headache, Billy— No, it’s ________. I’m all right now,mum.

一Whose T-shirt is this Is it Sally’s—No, it isn’t. _______ is white.

Jane tried to keep up a calm appearance，but her trembling voice ______.

It is often _____ that an American starts a speech with a joke,while a Japanese has an apology to make[ ]