The money he spent within a month ________ more than 1000 dollars．

A.added

B.added to

C.added up to

D.was added up

答案及解析： C

解析：

B项意为“添加”，C项意为“总计，加起来总和是”，根据句意，答案应选C。全句意为“他一个月花的钱总计有一千多美元”。