書名：多益題庫解析
頁數：32
題目：148
疑問：
If you unable to retrieve the truck yourself, you may send a representative who
must present a valid identification and a letter _____ that you permit
him or her to claim the vehicle on your behalf
A indicates B indicating C indicated D indication
大家好，我想請問為什麼不能選A要選B?
選B是作為形容辭修飾letter
但個人認為可以選A的理由是由於and對等連接詞的關係，將you may......,a letter....
視為兩個子句，a letter的子句缺少動詞，故選A
不知道哪裡的觀念有誤，還請大家解惑
謝謝