这道题考查 started 的近义词是 began ，又考查start/begin to do =start/begin doing所以应填began learning （听我的没错，实践是最好的证明）
My brother started to learn English two weeks ago.(同译句）My brother started learning English two weeks ago.或加一个空也可改为My brother had started learning English two weeks ago.（我可能答的不太好，多多包涵！！！）
began learning 说是have learned的人纯属文盲！！！！完成时不能与具体时间点（two weeks ago）连用begin doing sth.begin-began
可以用 got to,get to 有“开始做某事”的意思！或began learning ! 或taught himself ,因为teach oneself sth有“自学什么”的意思！别的暂时想不到了，回去替你问一下！
答：恭喜~~~今天基金涨得好，同喜详情>>
