--Have you tried to stop him eating too much junk food?Yes. But he still keeps eating

问题补充：

--Have you tried to stop him eating too much junk food?

--Yes. But he still keeps eating a lot of fried chicken wings.

A. from, from

B. from , /

C. /, from

D. for, from

答案：

A. from, from

(答案→)B. from , /

C. /, from

D. for, from

解析：句意：你已经设法阻止他吃那么多的垃圾食品了吗？---是的，但是他仍然保持吃许多油炸的鸡翅。Stop sb from doing sth 阻止某人做某事；keep doing 保持做某事；根据语境可知选B