fast asleep/sound asleep

fast asleep/sound asleep The little Hohnny was fast asleep ____he heard a strange sound at midnightA.as B.that C.when D.before As they were all fast asleep,neither of them heard the sound.请问此句错在哪里? 高中英语sound asleep用法 sound asleep怎么用 light doesn't travel as fast as sound,( 后面填：does it Sound doesn't travel as fast as light(改为反意疑问句） fast fall asleep/ fall fast asleep 哪个对? he is ( )awake,but his son is still ( )asleep A.wide,fast B.very,much C.full,very D.widely,sound 英语单选：——Do you know sound travels very fast?——Yes.But light travels () sound A as fast as英语单选：——Do you know sound travels very fast?——Yes.But light travels () sound A as fast asB much faster thanC a little faster th fall sound asleep,fall soundly asleep 哪个对啊 为什么是be fast asleep 而不是be fastly asleep? be fast asleep和 be wide awake we know ___ travels not so fast as light.A.sound B.sounds C.the sounds D.a sound选哪个,为什么? run as fast as 英语翻译my grandmother lay fast asleep on the couch,which was as soft as down,and did not wake until late in the morning. fast fall asleep/ fall fast asleep 哪个对?有助于回答者给出准确的答案 ——Do you know sound travels very fast?——Yes.But light travels ____ sound.A.as fast asB.little faster thanC.much faster thanD.slower than