二、单项选择(每小题1分,共15分) 16. I like playing _______ basketball, but my sister likes playing _______ piano. A. the, the B. the, / C. /, the D. /, / 17. She decided _______ hard at English at that time. A. work B. to work C. worked D. working 18. —_______ didn’t Jack go to school yesterday? —Because he was ill. A. How B. Why C. Where D. What 19. Would you like _______ the game with us? A. to play B. playing C. played D.