It could take 4-6 months before the first batch(批)of vaccines (疫苗)are available to fight A/H1N1 flu ________ as swine flu, WHO officials said.
—Did you get home a little earlier yesterday? —No. It was six o’clock________ we got home.
_______ size and population, how big is the European Union _________ China?
______ world’s largest retailer, Wal-Mart, has opened its _____ third store in Beijing, which means the firm now has 52 stores in China.
—We are planning to have a casual get-together this Saturday or Sunday. Are you coming? — ________. I’ve got rather a full day this weekend.
At the sight of the policeman _____from behind the door.