—I think it's_________ useful suggestion.
—Yes. It was_____ unforgettable experience for me
—Sorry, I have to meet some friends.
—I'm going to be ________ astronaut like Wang Yaping.
be a spell what please
— Ben.
— Fine, thanks.
—J-O-Y.
—A map.
a an the
—Yes, it is. It's English book.
—No, it's green one.
/、a 、an 或 the
—Yes. But I have onlybasketball.
— The one with ________ umbrella? He is our English teacher.
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