He can buy the car by ( ) and the rest within two years.

He can buy the car by ( ) and the rest within two years.
A、to pay 10% down
B、to pay 10% on
C、paying 10% down
D、paying 10% on
【正确答案】：C
【题目解析】：pay…down 预付款，句子含义是他可以预付10%，其余两年分期付完。