.How long do you think ______ will take tocomplete the sports center

_____ great progress we have made, weshould not be conceited.(自大的)

With a huge amount of food ________，all of the staff are busy preparing for the dinner tonight.

It was President Xi Jinping ______ visited the navy troops on April 19 and advocated that naval force ______.

Imagine what today’s life would be like ifAlexander Bellthe telephone morethan 130 years ago!