you'd better make a mark at which you have any questions.为什么是at which 而不是 where?

You'd better make a ____ answer to the question. You'd better make a list ( )what you want to buy before going shopping.You'd better make a list ( )what you want to buy before going shopping. when you read a book,you'd better make a mark___you have any questionat which wherewhy? you'd better make eye c___with your audience when you give a speech.空里写什么? you'd better make a plan ( ) over your lessonsA go Bgoing Cto go Dgoes some hot soup will ()you fell better A enjoy B make C find D win Can you help him ( )a better study plana.do b.has c.make d .draw you had better make You'd better ___ the baby ___.A.don't make,to cry B.not make,to cry C.not to make,cryD.not make,cry You'd better not make me up when you come in,_______?A.had you B.hadn't you C.wouldn't you D.would you to make you warm,you would better have a b---- you'd better make a mark at which you have any questions.为什么是at which 而不是 where? 20.When you read the book,you' d better make a mark _____ you have any questions.A.at which B.at where C.the place D.where when __,you'd better make youself__as much as posibile.A.talking,understand Bspeaking,understoowhen __,you'd better make youself__as much as posibile.A.talking,understand B.speaking,understood为什么选B? You make me want to be a better man! You make me want to be a better man! you make me want to be a better you make me want to be a better