A.is worthy to read B.is worthy reading
C.is worth of reading D.is worth reading
【解析】答案D。只有一本书值得读。“worth”后用动词的-ing形式，以主动表示被动。
[例6]I’ll go to downtown.Do you have any letter______？
A.of posting B.to post C.posted D.posting
【解析】答案B。我要去市区。你有没有信要寄？动词不定式表示被动。
[例7]On the wall______two large portraits.
A.hangs B.hang C.is hung D.are hung
【解析】答案B。墙上挂着两幅大的肖像画。“hang”挂着，主动形式表被动。表示地点的状语放句首，句子用全倒装。主语是“two large portraits”名词复数，谓语动词应为复数。
[例8]Our house______.
