MycousinoftenhelpshisclassmatestheirlessonsA)doB)doesC)doingD)did

Question

My cousin often helps his classmates___ their lessons A) do B)does C)doing D)did

Answer 1

help sb.do sth
help sb.with sth
所以肯定选A.
I often help my mother do housework.
I helped Alice with her English.我教了Alice英语.