They still go on working, ________ they feel tired.

The Apple founder and former CEO Jobs（乔布斯） ________ on Wednesday at the age of 56.

Look! There is a horse racing program on TV now.— Hmm …. It __exciting.

Lily, _____ you _____ your ticket?—Not yet!

Fifty dollars for such a T-shirt! You _______ be joking!—I’m serious．It’s made of silk.