题目

The boy had managed to persuade his parents that the summer camp was worth _____ in.（ ）A. to participateB. participateC. participatedD. participating

The boy had managed to persuade his parents that the summer camp was worth _____ in.（ ）

A. to participate

B. participate

C. participated

D. participating

题目解答

答案

D. participating

解析

步骤 1：识别句型
"it is worth doing sth." 是一个固定句型，意为"值得做某事"。在这个句型中，"worth" 后面需要跟动词的-ing形式。
步骤 2：分析选项
A. to participate - 不符合句型要求，因为"worth"后面需要跟动词的-ing形式。
B. participate - 不符合句型要求，因为"worth"后面需要跟动词的-ing形式。
C. participated - 过去分词形式，不符合句型要求。
D. participating - 动词的-ing形式，符合句型要求。
步骤 3：选择正确答案
根据句型要求，正确答案是D选项。