how to solve the problem, the little boy
题型:选择题
问题:
how to solve the problem, the little boy turned to his father for help.
A.Not knowing
B.Having not known
C.Not having been known
D.Not known
how to solve the problem, the little boy turned to his father for help.
A.Not knowing
B.Having not known
C.Not having been known
D.Not known