用圆圈表示星球上的空气，各星球上的空气所含的不同气体用不同的字母表示，相同的气体用相同的字母表示（如图）．已知天王星与海王星上的空气中都含有氦气，冥王星上没有．那么图中字母（　　）表示氦气．

增加：在缺词处加一个漏词符号（^），并在此符号下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1）每处错误及其修改均仅限一词。

2）只允许修改10处，多者（从第11处起）不计分。

3）必须按答题要求做题，否则不给分。

    Today is the happy day in this holiday. Although I was very tired, but I found myself in these busy days. I am afraid of taking a bus usual; the awful smell of the bus drives me mad, make me feel carsick. But today I did feel carsick. I can defeat carsickness finally. At night I went out with an old friend I ever liked him, but all of us were so busy with examinations at the high school that we hadn't been together. I was much surprised when I received his call that I could hardly believe my ears. At first, I think we would never meet before we graduated. Thank him for giving me a happy day!

《财富》全球论坛历届年会会址的选择，首要条件是经济最富活力、最具创新力的地方。2001年和2005年《财富》全球论坛都在我国召开。《财富》全球论坛之所以多次选择中国，是因为（  ）
①改革开放使中国经济充满生机和活力
②改革开放以来中国现代化建设取得举世瞩目的巨大成就
③中国综合经济实力日益增强，国际地位日益提高
④中国已成为世界上最发达的国家之一