132.
(A)because of
(B) in spite of
(C)unless
(D)but

A) because of（因為） ❌
➡ "I can't guarantee the approval of your request because of the team can manage..." 語法錯誤，因為 "because of" 需要接名詞或動名詞，而不是完整子句。

(B) in spite of（儘管） ❌
➡ "I can't guarantee the approval of your request in spite of the team can manage..." 語法錯誤，"in spite of" 也應接名詞，而不是完整子句。

(C) unless（除非） ✅ (正確答案)
➡ "I can't guarantee the approval of your request unless the team can manage..."（除非團隊能夠應對，否則我不能保證批准你的請假申請）語意符合對話情境。

(D) but（但是） ❌
➡ "I can't guarantee the approval of your request but the team can manage..." 語法錯誤，這裡需要的是「條件」連接詞，而 "but" 只是一個對比連接詞。