朗文文法改錯請教 - 自學

以下有兩個文法題 想請高手協助分析句型結構以及題目內容

有點不太了解的說


1.His efforts, which he claims are his best,
------------
A
would be less than satisfactory
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B
even to the least demanding person than myself.
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C D
正解是 C.




2.The manufacturer has test marketed a treated specially product
----------------- ---------------------------
A B

which could have an important effect on future products.
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C D

正解是 B.

這題的 B 是不是要改成 a specially treated product ?

那 A 的 has test marketed 是什麼意思?

總覺得這句念起來不太通順

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