You can’t imagine that a well-behaved gentleman _____ be so rude to a lady.

—Whose pencil sharpener is this? —It_________  mine  .Mine is here.I think it belongs to          .

Mr.Smith is on time for everything. How        he be late for the ceremony?

— Mum, would you please buy me an MP5 player?— If you can help do some housework the whole vacation，you ____ have one as a reward.

—Where did you get The Frog written by Mo Yan?—I picked it up from a bookshop online if you ________ know.