Why do the pupils of our eyes change size?知道的快!回答，不是翻译！！！

Why do the pupils of our eyes change size?知道的快!回答，不是翻译！！！ Why do the pupils like their science teacher? WHERE ARE THE PUPILS OF PART SCHOOL pupils take the General Certificate of Secondary Education(GCSE) examination. 翻译：the People's Park/two pupils of this class Most of the pupils live in school dormitiories啥意思 why did the pupils feel the way they did in the morning?如题.. which section of the newspaper do you usually read?why? Why do the seeds need lots of sun? why do the seds need lots of sun? WHY WE DO NOT HAVE THE RIGHT OF FREE SPEAKING! Do you think that the privacy of the celebrity should be protected?Why or why not? Do people eat dumplings at midnight of the eve of the featival?why? Why do I have to come to the hypocrisy of the world,live among the lies. 一道英语题如下:Do the pupils have any pencils?Yes,_____________________. Why do we say the world will be short of water in the future? Why do you think Australia adopted the Washminsterform of the polity? 英语翻译：why do i throw up the morning after the night of drinking?