It’s time _____ lunch.—OK. Let’s _____.

Have you heard the story of “The Merchant of Venice” —No. When and where does the story ______ ?

With the word“PM25″_____ appearing in media reports，people pay greater attention to it and seek health tips for smoggy days

The wet weather will continue tomorrow，when a cold front________to arrive

September 10th is __________ Day.