When you read a book, you've probably noticed that a brand new book has a rather special smell,   1   differs from that of an older book. Where does   2   come from? There are three sources — the paper, the ink and the glue.

The Chinese first produced paper, one of the greatest  3   (invent) in the world. It is made   4   wood. The wood must be processed with various chemicals   5   (add) to change its structure, to remove acid and to whiten the paper. Then comes the ink — there are many kinds. Some fade with time, while others get   6   (dark) than years ago. Finally, different glues are used to join the sheets together and attach the covers, whether hardcovers  7   paperbacks. Therefore, you can smell different chemicals  8   (come) out of your new book.

Today, the forms of books   9   (change) dramatically since the birth of e-books. They might be   10   (convenience), but you can't give your copy to others as a present, and they don't smell as nice.

參考答案

【語篇解讀】本文是一篇說明文。當你讀一本書時，你會注意到新書會發出一種相當特別的氣味，這種氣味來源于紙張、墨水和粘書所使用的膠水。

1．which　考查定語從句。分析句子結構可知，空處引導非限制性定語從句，在從句中作主語，指代“a rather special smell”，故填which。

2．it/that　考查代詞。根據語境可知，此處指代“a rather special smell”，故用代詞it或that。

3．inventions　考查名詞的單復數。根據該句中的“one of”可知，此處應用名詞的復數形式，故填inventions。

4．from　考查介詞。此處表示紙是用木材制成的，應用介詞from。be made from意為“由……制成”，尤其是指在原料已完全改變，無法辨認時；be made of意為“用……制成”，此時原料并未改變，仍可辨認。

5．added　考查非謂語動詞。分析句子結構可知，動詞add和其邏輯主語chemicals構成動賓關系，應用其過去分詞形式。

6．darker　考查形容詞的比較級。根據空后的比較級標志詞“than”和語境可知，此處應用比較級。

7．or　考查固定用法。此處表示不管是精裝書還是平裝書。whether ...or ...表示“不管……還是……”，故填or。

8．coming　考查非謂語動詞。分析句子結構可知，動詞come和其邏輯主語chemicals構成主謂關系，故用其現在分詞形式。

9．have changed/have been changing　考查動詞的時態。根據該句中的“since the birth of e-books”可知，此處可用現在完成時，表示過去發生的動作到現在已經結束；此處也可用現在完成進行時，表示一個動作從過去某時開始，延續到說話時刻，可能還要繼續下去。

10．convenient　考查形容詞。“be＋形容詞”構成系表結構，故填convenient。