6. Jim is ______ person, and everyone is willing to be ______ with him.

A. so kind a, friends                                  B. so a kind, friends

C. so kind a, friend                                    D. so a kind, friend

【陷阱】誤選C或D。認為 friend要用單數。

【分析】其實此題最佳答案為A。so kind a person相當于such a kind person，注意兩者中冠詞的位置不同。be friends with是習語，意為“與……友好”、“跟……做朋友”，與之同義的類似地還有make friends with。值得說明的是，這類短語中的名詞總是用復數，即使句子主語為單數也是如此。如：

He is friends with me. 他與我是朋友。

He has made friends with everyone here. 他與這兒的每個人交上了朋友。

7. We already have ______ pencils, but we need two ______ pens.

A. dozen of, dozen                                    B. dozens of, dozens

C. dozens of, dozen                                   D. dozens of, dozen of

【陷阱】誤選 B。

【分析】此題最佳答案為C。關于dozen的復數是否加詞尾-s的問題比較復雜，大致原則是：

(1) 當它與具體數字連用時，既不加復數詞尾-s，也不后接介詞of。盡管有的詞書也有 two dozen of 這樣的用例，但這已屬過時用法，在考試中應避免，如1992年全國高考有一道單項選擇題就認為two dozen of為錯誤選項：

Shortly after the accident, _____ police were sent to the spot to keep order.

A. dozens of                                             B. dozens       C. dozen of     D. dozen [D]

(2) 當它不與具體數字連用，而是表示不確定的泛指數時，則不僅要加復數詞尾-s，而且要后接介詞 of，此時可將dozens of(許多，幾十)視為習語。如：

I’ve been there dozens of times. 我去過那兒幾十次。

She’s got dozens of boy-friends. 她的男朋友很多。

下面一例中的dozens加了復數詞尾-s也屬為似情況：

Pack them in dozens. 按打裝袋吧。

(3) 當與 a few, several 等數目不很具體的詞連用時，加不加復數詞尾-s均可，但需注意：不加復數詞尾-s時，其后的介詞of可以省略；加詞尾-s時，其后介詞 of不能省略。如：

several dozen (of) pencils=several dozens of pencils幾打鉛筆

注：英語較少使用many dozen的說法，要表示類似意思可用dozens of。

(4) 當它后面的名詞受 the, these, those 等特指限定詞修飾時，或其后的接的是us, them這樣的人稱代詞時，則此時必須用介詞 of。如：

two dozen of these eggs 兩打這種雞蛋

three dozen of them 它們中的3打

注：score, hundred, thousand, million等也具有以上類似用法。

8. She raised her finger to her lips as _____ for silence.

A. an idea                                                 B. a mark

C. a sign                                                   D. a word

【陷阱】容易誤選B。

【分析】應選C，sign與mark的區別是：sign 的意思是“跡象”、“征兆”gesture or movement made with the hand, head, etc, used to give information, a command, etc(用手或頭等做出示意動作以傳遞信息或命令等)，mark 的意思是 written or printed symbol or figure, line etc made as signor an indication of sth(書寫與印刷的符號或圖、線等記號)。根據此二詞的語義區別以及常識可知答案為C。類似地，下面兩題的答案也是C：

(1) Those black clouds are a sure _____ that it’s going to rain.

A. thing                                                   B. mark

C. sign                                                     D. one

(2) Just as a famous Chinese saying goes, a timely heavy snow is a ______ of good harvest next year.

A. mark                                                   B. track

C. sign                                                     D. appearance

但是，下面一題卻不能選sign，也不能選mark，而選symbol(象征)：

The lion is considered the king of the forest as it is a(n) _____ of courage and power.

A. example                                               B. sign

C. mark                                                    D. symbol

順便說一句，在近幾年的高考中像這類結合詞義區別以及語境和生活常識進行考查的試題經常出現，同學們需引起注意。

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