憨豆先生的扮演者艾特金森患有严重的口吃，对于演员来说，这可是致命的缺陷。他知道自己很难真正克服口吃，因此在剧中极少说话，只是偶尔含混不清的咕哝几句。但这样就大大增加了表演的难度，需要艾特金森将原来用语言就能轻松表达出的笑点、创意转换成夸张、搞笑的表情和动作。为此，艾特金森为了自己喜欢的喜剧事业，他每天在镜子面前研究自己，揣摩最佳的幽默效果，最终凭借丰富的肢体动作和多变的面部表情走红全球，成为世界级喜剧明星。

问题：阅读分析材料，说一说患严重口吃的憨豆先生为何能成为世界级的喜剧明星？

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

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。

    Last week, our teacher offered us an answer to a difficulty maths problem in class. Though an answer seemed a little strange, but nobody doubted it except me. Thinking that his answer might wrong, I carefully studied the problem and tried to work them out in a different way. Half an hour late, I managed to find the correct answer. When I show my answer to him, my teacher praised me of my independent thinking.

    From this experiences I have learnt that questioning can serve as a bridge that help us to find the truth.

读一读，把相应的大小写字母连起来。

① ____ A.

② ____ B.

③ ____ C.

④ ____ D.