问几道英语趣味题?每格一词1、智力测试What is the saddest animal in the ocean?_

问几道英语趣味题?
每格一词
1、智力测试
What is the saddest animal in the ocean?________
2、this number and math system came into the Arab world=this number and math system was _____ into
the Arab world.
3、You think I was frightened?Well,I _____.I was actually quite courageous(勇敢的).
这格填wasn't,didn't还是其他什么?
4、说数字是唯一的普遍通用的语言,数字是我们生活中的一个重要组成部分
这是在讲数字的地位,the status of numbers,还是讲数字的重要性significance,还是其他?
可以知道哪个就回答哪个……