题目内容
________ that you were in trouble, I’d have already come to your help at that time.
[ ]
A. If I knew
B. Should I know
C. Were I to know
D. Had I known
答案:D
提示:
提示:
|
“Had I known”相当于“if I had know”这在虚拟条件从句中的同一意思的不同表达形式。 |
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