What do you think of the book?　-Oh, excellent. It is worth _____ second time.

Shen Xue and Zhao Hongbo won the gold medalfor China so we’re proud _____them. [ ]

Do you know Jim quarreled with his wife?—I don’t know._____. [ ]

My mother goes to work __________.[ ]

David, your mother’s birthday is _____. Let’s think about how to celebrate it.—OK, Dad.