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。

    Halloween is on first day of November, and it was very popular in some western countries. On that day, people, especial kids, dress in horrible styles. We knock from door to door. Where people don't give them to sweets, the kids will play tricks on them. In China, more and more young people like to follow this trend. They'd like to join on some activities on that day. They wear strangely clothes and find some funs. When the night comes, they always have a party, sing and dancing together.

4.6×6=____   8.9×7=____   15.6×13=____

0.18×15=____   0.025×14= ____  3.06×36=____

复数$z=\cos 120°+i\sin 120°$,则$z^3=$（   ）.

如图为美国略图，读图，完成下列各题。