选c 先由时间逻辑排除while。因为after aeveral years of growth, company 变成largest,这之后(then)发现company出现问题。 时态问题排除D(proving) 在C,E间艰难抉择,区别就在于一个it 一个its 关于it,有人支持E说but后可以省略主谓语,确实有省略情况,但不是这句子得情况(参照LDCE) 1 used to connect two statements or phrases when the second one adds something different or seems surprising after the first one It's an old car, but it's very reliable. They rushed to the hospital, but they were too late. We've invited the boss, but she may decide not to come. an expensive but extremely useful book 'Has he got any experience?' 'No, but he's keen to learn.' 2 used to introduce a statement that explains why the thing you have mentioned did not happen or is not possible I'd like to go but I'm too busy. They would have married sooner, but they had to wait for her divorce. 3 used after a negative to emphasize that it is the second part of the sentence that is true He lied to the court not just once, but on several occasions. The purpose of the scheme is not to help the employers but to provide work for young people. 4 except What can we do but sit and wait? I had no choice but to accept the challenge. Not a day goes by but I think of dear old Larry (=I think of him every day) . 很明显此句是but得第一种情况---but连接2个陈述,其中第二个陈述转折。例句中but前后主谓都一样但都没有省略,而且可以看到省略后很奇怪 回头看C中得it 是完全成立的。虽然 sth be proved经常用被动,但是也能用主动可以约等于be的作用linking一个问题。 引用LDCE: 2 ▶BE◀ [linking verb] if someone or something proves difficult, helpful, a problem etc, they are difficult, helpful, a problem etc The recent revelations may prove embarrassing to the President. 关于its,有比没有好,参照fall behind的用法 3 to fail to finish a piece of work or pay someone money that you owe them at the right time fall behind (somebody/something) with/on After losing his job, he fell behind with his mortgage payments. The project has fallen behind schedule . 发现接有主人的名词比动名词好 综上,选C |