21-25 BDCDB 26-30 CBDBA 31-35 CADDB,36-40 BAACD 41-45 BBCCA,46-50 BCDAC 51-55 BCADC 56-60 CDABB,61-65 BADCC 66-69 DBBA,70 insisted 71 prove 72 immediately 73 enemies 74 polluted,75 beauty 美 n. 76 breath 77 known 78 bled 79 to go 80 specially,81 plan 82 in a group 83 always 84 wait for 85 spreading,86 Measures 87 increased 88 organized 89 affected 90 paid,91 Never/Dont 92 faces 93 window(s) 94 thieves 95 Leave,96 top 97 around 98 higher 99 seeing 100 another,101 than 102 different 103 buy 104 enjoy 105 fun,With the development of science and technology, today robots are widely in different areas. They go into peoples lives and people are more and more familiar with them.,There are some advantages to have a robot. It can do all the housework. It can be a teacher. It can also help scientists explore dangerous places.,However, having a robot also has some disadvantages. If the robot catches a virus, it will cause a lot of problems. Sometimes it might make our life in a mess.,I want to have a robot. It can help me do my homework, so I will have more spare time for my hobbies. I will be careful with my robot and we can be good friends.,或：I dont want to have a robot. Its just a machine and you have to check it often. Sometimes it cant do everything right and even make things worse.,