題4：Was it five o’clock ______the fire broke out?

A. when                                           B. that

C. which                                          D. in which

【陷阱】容易誤選B，誤認為這是強調句。

【分析】其實，此題應選A，這不是強調句。因為在強調句中，若去掉強調句的結構詞 it is [was]…that…，句子結構仍然完整，但此句不是這樣，若去掉結構詞，即為 Five o’clock the fire broke out，句子不完整，但若在five o’clock前加上介詞at則可以，因為 at five o’clock 用作時間狀語。此題選A可分析為：it 表時間，when the fire broke out 為時間狀語從句，全句意為“火災是5點鐘發(fā)生的嗎?”比較下面一題（答案選B，為強調句）：

Was it at five o’clock ______the fire broke out?

A. when                                          B. that

C. which                                         D. in which

題5：It’s more than half a century _____ my grandfather joined the Party and became a servant to the people.

A. when                                          B. that

C. since                                          D. while

【陷阱】容易誤選B，認為這是強調句型。

【分析】假若選B，將此句分析為強調句，那么若將此句還原為非強調句就應該是My grandfather joined the Party and became a servant to the people more than half a century. 很顯然, 句中的 more than half a century 是一段時間，然而它修飾的謂語動詞 joined…became 卻是兩個終止性動詞，這顯然不合適。其實，此題應選C，屬于“It is＋一段時間＋since 從句”句型，句意為“我爺爺加入黨組織成為人民的公仆已有半個多世紀了”。此句的主句謂語也可以用現在完成時態(tài)(has been)，但在口語中多用一般現在時代替。

題6：It was lack of money, not of effort, _____ defeated their plan.

A. which                                        B. as

C. that                                           D. what

【陷阱】容易誤選A，受空格前逗號的影響，誤認為這是一個非限制性定語從句，從而誤選了A。

【分析】其實，此題最佳答案為C，整個句子為強調句，被強調成分為 lack of money, not of effort。由于句中插入 not of effort 這一結構，干擾了許多同學對 it was lack of money that defeated their plan 這一強調句的認識和理解。

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