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4．If she ___ about his financial situation，she would have helped him out．（　　）

	A．	knew		B．	had been knowing
	C．	had known		D．	have known

分析如果她知道他的經濟狀況，她會幫他擺脫困境的．

解答答案：C
分析句意可知，本句是虛擬條件句；由于主句的謂語部分使用了"would have helped"，因此此處表示與過去事實相反的情況；根據時態對稱的原則，從句應該使用過去完成時，故選C

點評本題考查了虛擬條件句的用法．在確定了該句為虛擬條件句后，需要根據虛擬條件句中關于時態對稱的原則，選擇相應的時態；如：本題考查了當表示與過去事實相反的情況時，從句使用過去完成時，主句用would/should/could/might+have+動詞的過去分詞．

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