A group of young Americans have come to Beijing for a visit. Half of them, ___is, 50 persons, can speak Chinese fluently.
— How was his explanation at the court? — So convincing ______ that I entirely approved of it.
______ such experience will constantly trouble you in your business.
In history, every great culture had its own ideas of beauty ______ in art and literature.
In summer, iced sweet food is really ______ to children.
— Would you mind my challenging you to a game of chess? — ______.