11. What the teacher said _______ our confidence to pass the exam.
   A. added up to                      B. added to                C. added up       D. added
12. The Eight-treasure rice pudding was soon out of stock as it ______ amazingly delicious.
   A. was tasted                 B. has been tasted          C. has tasted        D. tasted
13. Li Chang used _______ on the right in China, but he soon got used ______ on the left in
   Australia.
   A. to drive, to drive                              B. to drive, driving 
   C. to driving, to drive                            D. to drive, to driving