Many teenagers study hard.是属于什么句型的?

Many teenagers study hard.是属于什么句型的? 连词成句smoking is a teenagers serious a study shows many Chinese problem for many teenagers think their many ads are aimed------(special) at teenagers. Many teenagers have an u____ diet. Many teenagers have hobbies.课文翻译 teenagers good food and exercise __(help) teenagers study __(well). British teenagers can leave school at sixteen after taking their GCSE exams.They study for esamsin as many as ten subjects,__ they have to work pretty hard!Today's teens speed more time doing their homework than any teenagers in the past,studying for many advertisements are a__________ specifically at teenagers 填什么? I have many of the same interests as other teenagers. Many ads __________________ specifically at teenagers in the modern world.Many ads __________________ specifically at teenagers in the modernworld.(aim) 完形填空：1.Many students in China are learning English.Some of these students are small c___.O___ are teenagers.Many are adults.Some learn at school,while others study by t___.A few learn English language over the radio,on t__,or in films.One m 用四句或五句话 概括文章大意Many students in China are learning English.Some of these sutdents are small children.Others are teenagers.Many are adults.Some learn at school,others study by themselves.A few learn English language over the r We think it's a good idea to allow teenagers to study in groups?为什么allow、study前加to? parents allow teenagers to study in groups during the evening.(改为被动语态） american teenagers (take) a lot of part-time jobs.a.makeb.givec.dod.study Many ads are aimed specificaly at teenagers.为什么这里ad要用被动语态?为什么不能直接写成many ads aim specificaly at teenagers?