“______ the friendship between our two people last forever!”, and with this sincere hope, the president concluded his speech.

Have you been to the Great Wall? —Perhaps not in my memory. ________, it might have been during my early childhood.

It is the first time that I _______ this kind of tasty moon cake.

_________ do you go to movies?—Once a month..

Bob doing homework?—No, he isn’t. He is a letter.