In ______ winter it is cold in ______ Beijing and warm in________Shanghai. 9. John is______ cleverest boy in his class. 10. We can't live without ______ water or ______ air. 11. Tomorrow Mr. Smith will leave Paris, ______capital of______ France, for Washington by______ air. 12. We were having______ lunch when they came in. 13. This is ______ book you gave me last week. 14. What did you do ______ last Saturday?