In the past few months, a discussion ________about whether selecting “Three Goods” Students in elementary and middle schools should be cancelled

Lu Xun is known __________us ___________ a great writer[ ]

Are you familiar with the music — Yes There was a time _____ this kindof music was quite popular

Perhaps the day will come ____ people willbe able to breathe clean air in cities．

Hi, Lucy. Your skirt isvery nice.—____