Millie and Kitty are good friends, they
题型:选择题
问题:
Millie and Kitty are good friends, they often _________ each other _________study.
A.helping; with
B.help; to
C.helping; to
D.help; with
Millie and Kitty are good friends, they often _________ each other _________study.
A.helping; with
B.help; to
C.helping; to
D.help; with