John, you are late . The match ............. ten minutes ago

1 . John , you are late . The match ............. ten minutes ago
a. starts                b. started                  c. is starting
2. Ben wrote his parents a postcard ........... he was on holiday .
a. because             b. and                   c. while
3. Hong Kong is famous for ............ double-decker buses.
a. its                      b. it              it's