___ 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 |
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___ 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 |