Liu Xiang has failed over and over again in the past years. And that's _________ he succeeds.

—What else do you want for the dinner?—       else. I don’t think I can eat more.

I like junk food so much because ______ really delicious.

 ________are in the same class.

---____ skirt is blue.____ is red. Which of them do you prefer?---______ is OK. I like their styles.