OG198

198. Although Napoleon's army entered Russia with far more supplies than they had in their previous campaigns, it had provisions for only twenty-four days.

(A)  they had in their previous campaigns

(B)  their previous campaigns had had

(C)  they had for any previous campaign

(D)  in their previous campaigns

(E)   for any previous campaign

If than is followed by a clause referring to army, the subject of that clause must be singular (it). Furthermore, the verb of that clause will need to be in the past perfect form (had had) because it refers to a time before the simple past of entered. Finally, the preposition for is more precise than in because supplies are gathered for an upcoming campaign. Choices A and C incorrectly use the plural they and the simple past had. Moreover, A uses the less precise in. Choices D and E wisely dispense with the full clause and use a simple prepositional phrase. D, however, uses the imprecise in and the plural their. Only E, the best choice, avoids all the errors mentioned above.

看了 OG198的各个讨论总没有深刻理解, 为什么it出现了, ABCD的选项就错了. 这道题目请各位帮助我一下吧.谢谢.

个人见解

it 表明了Napoleon's army 是单数，所以出现they，their，就必错了。