The old lady’s hand shook frequently.She explained to her doctor this shaking had begun h

问题补充：

The old lady’s hand shook frequently.She explained to her doctor this shaking had begun half a year before, and, only because of this, she had been forced to give up her job.

A. when;how

B. how;when

C. how;how

D. why;why

答案：

A. when;how

B. how;when

(答案→)C. how;how

D. why;why

解析：此题考查动词的宾语从句。两个宾语从句中都需要由how 来引导， how在从句中作方式状语，表示“怎么样”。句子中已经有时间和原因状语，所以排除A和D项。