His mother often helps him ___ English so he does better ___ English than others.;

问题描述:

His mother often helps him ___ English so he does better ___ English than others.;
A.with; in B.on; in C.in; with D.with; at

答案选A.with; in
help sb with sth 帮助某人某事
do well in
在……某方面干得好