Theoldlady'shandshookfrequently.Sheexplainedtoherdocto...

問題詳情：

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

A. when; how               B. how; when                C. how; how                 D. why; why

【回答】

C

知識點：連詞

題型：選擇題