问题
_______, her hands shook constantly and violently.
A:Knowing her son killed in the mine
B:When she knew her son was killed in the mine
C:Known her son killed in the mine
D:She knew her son killed in the mine
B:When she knew her son was killed in the mine
C:Known her son killed in the mine
D:She knew her son killed in the mine
正确答案是：
同类题型
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