Your pocket money can be used to charity, you used to a lot on snacks.
A. supporting; spend
B. support; spending
C. support; spend
D. supporting; spending
网友回答
A. supporting; spend
B. support; spending
(答案→)C. support; spend
D. supporting; spending
解析：be used to sth习惯于某事;used to do sth过去常常做某事. sth be used to do sth某物被用来做某事。句意：你的零用钱可以用于慈善事业，你过去常常花很多钱买零食。结合语境可知选C。