1. If you suffer an injury during _______ exercise, or if _______ pain or discomfort makes you think an injury is developing, stop right away and call me.
A. 不填; 不填               B. 不填; the           C. an; the                   D. the; a 
2. Now my hometown is not at all _______ a traveler who visited it ten years ago can expect.
   A. that             B. what               C. which                D. where