Manycareersrequireacollegedegree;somejobs,________,onlyrequirepreviousexperience.
A、however_isknowntotheworld,MarkTwainwasagreatAmericanwriter.
Moviegoersknowthatmanyspecialeffectsarecreatedbycomputers,theyoftendon'tknowisthatthesescenesstillrequirealotofwork.
Manycareersrequireacollegedegree;somejobs,________,onlyrequirepreviousexperience.
Johncomplainedtothebooksellerthattherewereseveralpages______inthedictionary.
Ihaven'tbeentoapopfestivalbeforeandMikehasn't__
