It is a long time _____I saw you last． ——Yes．And it will be a long time _____ we see each other again．

Wow ! Everything ______ half price. That is too great .

Great changes ________ in China since the People’s Republic of China _________ in 1949.

What a terrible earthquake!—Yes. It came at about 6.30 this morning. I ________ to the bus stop at that time.

My mother ___once a week.