___ help the people in the snowstorm in
题型:选择题
问题:
___ help the people in the snowstorm in the south made him worried.
A.Not known how to
B.Unknown what to do to
C.His knowing not how to
D.His not knowing how to
___ help the people in the snowstorm in the south made him worried.
A.Not known how to
B.Unknown what to do to
C.His knowing not how to
D.His not knowing how to