Which of the following can we NOT see at the Olympic Games?
He________dinner at restaurants last year，but now he usually comes back home after work and cooks supper for his family．
To make our school more beautiful，rubbish________into the river．A．can’t throwB．mustn’t be thrownC．needn’t be thrown
—Your classroom is very clean．—Sure．It________after school every day．
—He’s never stolen anything before，________he?—________．It’s his second time to be taken to the police station．
The window________by some kids who were playing ball．
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