The Young Pioneers are helping the old woman __.A.cleaning the house B.with clean the house
问题描述:
The Young Pioneers are helping the old woman __.A.cleaning the house B.with clean the house
C.clean the house D.cleans the house
答
Chelp sb (to)do sth (to)可以省略. 还可以是help sb with sth 帮助某人做某事