的人"，从句说明question的内容。

　　8．The advantage is ________the cost of this method is low.

　　答案：that　设空处引导表语从句在从句中不作成分，无语义，只起连接作用，故填that。

　　9．I can't ________(undertake) that you will win in the election.

　　答案：undertake　由空前的情态动词can可知应填动词原形。I can't undertake that ... "我无法承诺......"。

　　10．You can use my computer on condition ________ you return it tomorrow.

　　答案：that　on condition that ... "条件是......；只要......"。

　　Ⅱ.单句改错

　　1．The story he told the police differed in the one he told his mother.

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　　答案：in→from　differ from ... "和......不同"。

　　2．Owed to her assistance, we succeeded in starting the engine.

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　　答案：Owed→Owing　owing to ... "因为......；由于......"，为固定用法。

　　3．It suddenly struck to me that we should make a new plan.

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　　答案：去掉to　It strikes sb. that ... "某人突然想起......"。

　　4．My mother makes a promise if I passed the exam, she would buy me a watch.

　　____________________________________________________

答案：promise后加that　该句为that引导的同位语从句，tha