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
网友回答
A. when; how
B. how; when
(答案→)C. how; how
D. why; why
解析：主要测试宾语从句。有语境可知句子意思：这位老太太的手总是颤抖。她向医生解释了半年前手的晃动是怎样开始的；仅仅因为这一点，她又是如何被迫放弃工作的。解决此题的关键在于分清句子的结构：动词explain后面接了两个宾语从句，原因在于该动词为及物动词，另外再结合从句的结构可知句中只缺少方式状语，故此答案为C.