Question

He often helps his mother_____ the housework

A to do
B do
C with
D A,B and C

Answer 1

应该选D，因为help sb (to) do sth ：帮助某人做某事。help sb with sth：帮助某人在某方面，故A/B/C选项都正确，因此选D

Answer 2

选择 D 以上三种都对 help sb do/to do/ with sth 都是帮助某人干某事的意思

Answer 3

D