—What do you think of the book? —It’s ______ a book. It serves as (充当)a really good guide to job hunters.
_____ different life today is from _______ it was thirty years ago.
.To his great excitement, the day he looked forward to _______ at last!
Jack said that he was sure of succeeding in passing the Totel Examination this time, _______, in my opinion, I don’t think so.
We must take measures to protect endangered wildlife _______ it is too late.
Listen!, his family must be quarreling, _______?