基本信息
ⅱ. grammar and vocabulary
directions: beneath each of the following sentences there are four choices marked a, b, c and d. choose the one answer that best completes the sentence.
25. leaves are found on all kinds of trees, but they differ greatly ________ size and shape.
a. onb. fromc. byd. in
【解析】介词的用法。
介词in表示“在......方面。句意：“人们发现树上长着各种各样的叶子，但它们的大小、形状大不相同。differ from与…..不同，与本题题意符合。
答案：d
26. the mayor has offered a reward of $ 5000 to ______ who can capture the tiger alive or dead.
a. bothb. othersc. anyoned. another
【解析】不定代词的用法。
根据句意，应选c项。谁能捕获那只老虎，无论死活，市长将赏金5000美元。其它三个选项均与题意不符。
答案：c
27. alan is a careful driver, but he drives ______ of my friends.
a. more carefully b. the most carefully c. less carefully d. the least carefully
【解析】形容词（副词）比较等级在特定语境中的用法。
由题干中的but可知，后半句表否定意义，故选d项。the least+形容词（副词）+原形，表示“最不……”。
答案：d
