全句意思是：“旅館管理部門懇請客人晚上11點后不要打開收音機”。句中的謂語動詞request(請求)所引出的從句應當用虛擬語氣，即動詞原形或“should+動詞原形”。本句的主語從句中，主語radio是謂語動詞play 的客體，謂語應當用被動語態。所以，答案是C) not be played。在上述這類句子中不能用動詞過去時形式表示虛擬語氣，所以A)不正確。選項B) not to play是動詞帶to的不定式，不能在句中作謂語。選項D)did not play也是動詞play的過去時形式，同樣不能在本句中作為虛擬語氣來使用。而且，它是主動語態形式，而本題要用被動語態。

　　練習：

　　16). The chairman requested that .

　　[A]the members studied more carefully the problem

　　[B]the problem was more carefulnessly studied

　　[C]with more carefulness the problem could be studied

　　[D]the members study the problem more carefully

　　17). The committee recommends that the matter at the next meeting .

　　[A]would be discussed

　　[B]will be discussed

　　[C]be discussed

　　[D]may be discussed

　　18). The doctor insisted that his patient .

　　[A]that he not work too hard for three months

　　[B]take it easy for three months

　　[C]taking it easy inside of three months

　　[D]to take some vacations for three months

　　三、在expect, believe, think, suspect等動詞的否定或疑問形式后的賓語從句中的虛擬語氣

　　在expect, believe, think, suspect等動詞的否定或疑問形式后的賓語從句中，我們經常用“should+動詞原形(或完成形式)”，表示驚奇，懷疑，不滿等。

　　I never thought that he should be such a brave young soldier.

　　我們從來沒想到他是個如此勇敢的小戰士。

　　練習：

　　1) that the time will soon be ripe for intervention in Iran，they would be faced by a large army?

　　[A]It is believed

　　[B]Should they believe

　　[C]They would believe

　　[D]If they would believe

　　2) I think it advisable that he for Tokyo soon.

　　[A]will leave

　　[B]may leave

　　[C]leave

　　[D]leaves

　　四、would rather ， would sooner，had rather， would (just) as soon ，would prefer之后的賓語從句中的虛擬語氣

　　would rather , would sooner, had rather, would (just) as soon，would prefer(希望)也用來表達主觀愿望，它們之后的賓語從句中需用虛擬語氣。謂語動詞用過去式表示現在或將來，用過去完成式表示與過去事實相反。表示”寧愿做什么”或"對過去做的事的懊悔"。

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