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10．It's hard to believe_______ such a difficult math problem without the help of your teacher．（　　）

	A．	What you will work out		B．	how did you manage to work out
	C．	how you manage to work out		D．	why did you manage to work out

分析很難相信沒有你老師的幫忙你怎樣成功的解答出如此難的數學題．

解答答案：C．believe后加賓語從句，引導詞+陳述句語序，故排除B，D．結合such a difficult math problem without the help of your teacher用how you manage to work out表達沒有你老師的幫忙你怎樣成功的解答出如此難的數學題，句意通順，故選C．

點評本題旨在考查賓語從句這一語法，做這類題時，要從三方面考慮：一、選準連接詞二、連接詞后緊跟從句的主語三、若主句是過去時，從句要改為相對應的過去時．

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