D. worthy of looking up

　　答案　C

　　解析　短语be worth后面要求跟动名词形式，且用主动形式表示被动的意思，而be worthy后的结构为of being done或to be done。

　　2. The brake of your bicycle has come loose. You'd better ________ it.

　　A. settle B. fix C. pick D. correct

　　答案　B

　　解析　考查动词的辨析。前一句话说明自行车闸松了，因此这里使用动词fix，表示"加固；拧紧"的意思。

　　3. The road sign is easy to read；the words ________ well.

　　A. come out B. stand out C. go out D. keep out

　　答案　B

　　解析　短语stand out的意思为"突出；显眼；醒目"。

　　4. On the opposite wall ________ dozens of pictures ________ two maps of China.

　　A. hang；including

　　B. is hung；together with

　　C. are hanged：with

　　D. are hanging；as well as

　　答案　A

解析　句意：对面墙上挂着十几张画，其中包括两张中国地图。