Usually a meteorological observatory (气象台) _____ air quality in urban areas from one to five: excellent, fairly good, slightly polluted, poor, and dangerous.
Our teacher told us that _______ moon moves around ______ earth, and ________ earth circles________ sun.
There is egg on the table, egg is for you.
Let's look at the bag. Can you see _____“s”on the corner of_____ bag?
--Have you had ________ breakfast yet? -- No, not yet.
She read the letter loudly ________ all the families could hear.