The post office is about 1 kilometer __________.

 — Mum, would you please buy me an ipad?— If you can help do the dishes the whole vacation, you ______ have one as a reward.

－Sorry, Miss Liu. I forgot __________ my homework to school. －__________ so careless, Sandy.

China’s word，tuhao，which caught the attention of the dictionary’s editing team，__________ be in next year’s Oxford English Dictionary．

－ Whose is this blue bike? －It ________ be Mary’s. Her bike is black and white.