17. Birds are often thought of as flying reptiles _____ a lot of features in common.
(A) in that they have
(B) in that have
(C) they have
(D) in they have

這題考的是 連接詞結構與關係子句，特別是片語 "in that" 的用法。

✅ 題目句子：

Birds are often thought of as flying reptiles _____ a lot of features in common.

句意為：
「鳥類常被認為是飛行的爬蟲類，因為牠們和爬蟲類有很多共通之處。」

? 關鍵解析："in that" 是一個連接詞片語

• in that = because / for the reason that（因為）✅

• 是標準的引導副詞子句的方式

• 後面要接一個完整的句子（S + V）

✨ 正確語法應該是：

… in that they have a lot of features in common.

表示：「因為牠們有很多相同特徵」

? 選項解析：

(A) in that they have ✅

✔ 完整副詞子句
✔ "in that" 引導原因，"they have" 是完整句子
✔ 意思清楚：因為牠們有許多共通特徵

(B) in that have ❌

✘ 缺少主詞（they），語法錯誤

(C) they have ❌

✘ 沒有連接詞，直接接上一句不通順
✘ 缺乏語意連接（需要原因連接）

(D) in they have ❌

✘ “in they” 是錯誤搭配
✘ 沒有 “that” 做為關係引導詞，不構成正確副詞子句

✅ 正確答案是：

(A) in that they have

? 延伸學習："in that" 用法例句：

• She is lucky in that she has supportive parents.

• The device is unique in that it combines AI and human input.