【开放英语4(英语II(2))-1162网上形考机考题库】 Charles regretted ______ the TV set last year. The price has now come down.

【开放英语4(英语II(2))-1162网上形考机考题库】 Charles regretted ______ the TV set last year. The price has now come down.
A. buying
B. to buy
C. of
D. from