his parents,as well as his teacher,()his ability to improve his study.
问题描述：
his parents,as well as his teacher,()his ability to improve his study.
A.was convinced ofB.were convinced of C.was convincingD.were convincing
答
主语 his parents ,那么谓语动词肯定是复数,A C排除
B D 根据语态,用过去进行时,且主动失态,所以答案是D难道有convince sth to do的用法吗？
convince sb. to do sth 劝说某人做某事
不好意思，我答案选错了，应该是B
因为后面接的是his ability 而不是him