3 Complete the passage with the proper form of the words in brackets. 用括号中所给单词的正确形式补全短文。

Yiming had an (1) (amaze) weekend! He was always curious about how things worked, so he decided to find out how his bike’s gears fit together. He loved the mechanisms (机械装置) and spent hours carefully taking them apart and studying them. It was a (2) (challenge) but rewarding experience. After understanding how everything fit together, he felt (3) (excite).
Lisa was (4) (impress) when Yiming shared his discovery. She commented that it was really impressive and that she wouldn’t even know where to start with that. She also expressed that she was proud of Yiming for taking on such a difficult task. Yiming was (5) (please) to have learned so much and was looking forward to taking his bike on a long ride.

C

(1) amazing (2) challenging (3) excited (4) impressed (5) pleased

【分析】
本题考查英语中形容词的正确形式运用，核心是区分形容词的-ing形式与-ed形式的用法，以及部分固定搭配。解题思路：1. 修饰事物时，用-ing结尾的形容词，表“令人……的”；2. 描述人的感受时，用-ed结尾的形容词，表“感到……的”；3. 结合语境判断固定搭配的正确形式，完成填空。
【解析】
(1) 修饰名词weekend（事物），需用amaze的形容词-ing形式amazing，表“令人惊奇的”；
(2) 修饰名词experience（事物），需用challenge的形容词-ing形式challenging，表“有挑战性的”；
(3) 描述主语he（人）的感受，需用excite的形容词-ed形式excited，表“感到兴奋的”；
(4) 主语是Lisa（人），结合语境表“被打动”，需用impress的形容词-ed形式impressed，构成固定搭配be impressed；
(5) 描述主语Yiming（人）的感受，需用please的形容词-ed形式pleased，构成固定搭配be pleased to do sth.。
【答案】(1) amazing (2) challenging (3) excited (4) impressed (5) pleased
【知识点】形容词的-ing与-ed形式、固定搭配
【点评】本题为基础词形转换题，聚焦形容词的核心用法，难度适中，需准确区分修饰人/物时的形容词形式差异，同时牢记常用固定搭配，适合巩固初中英语基础。
【难度系数】0.6