Oh dear!What on earth _______this mean?A．could B．may C．must D．can

Oh dear!What on earth_____this mean?A could B can C may D might选哪个, Oh dear!What on earth _______this mean?A．could B．may C．must D．can oh dear和dear Oh,my dear follow oh my dear friend oh dear 是什么意思呀! eart hides what we can't say.But eyes say what we try to hide. 以What should we do to prtect our eart?的英语作文1.30分要 英语阅读理解：Millions of years age there were many types of dinosaurs on eart Dinosaurs existed on eart more than sixty million years before human beings的意思是什么 Oh dear,my dear,it's too dear! oh'dear my dear;it's too dear oh dear的中文意思 oh.dear.its.cloudy now. 英语翻译我需要这首歌的中文翻译Instant Karma's gonna get you,Gonna knock you right on the head,You better get yourself together,Pretty soon you're gonna be dead,What in the world you thinking of,Laughing in the face of love,What on eart Dear,what happened to Dear What is happen? Dear,Keep on walking