51. Salt is p_______ in East and South China.

     50. If you want to shop on the Internet, you should fill in the p_______ information.

     49. There's nothing in the box, so it's e_______.

     48. I'm going to an English training school to i_______ my English.

     47. Sam's uncle is an old s_______, he has been in the army for 20years.

     46. The house is so expensive that I can't a. _______ it.