求教逗号问题

gaochaoNK · 发表于 2011-9-6 21:21:29

169.Because the enemy’s new ship is the quietest （and it is therefore the most elusive submarine, it is being increasingly viewed） by the military as a threat to security.
(A) and it is therefore the most elusive submarine, it is being increasingly viewed
(B) it is therefore the most elusive of submarines, and it has increased the view
(C) and therefore the most elusive submarine, it is being increasingly viewed
(D) and therefore it is the most elusive of submarines, there is an increasing view
(E) therefore being the most elusive of submarines, it is increasingly viewed
答案说A、Dand前少了逗号，这逗号为什么要放在这啊

fdrandom · 发表于 2011-9-7 11:23:02

答案选C么？
觉得it is放在这里不简洁，主语一样就可以省略的

求教逗号问题

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