_isknowntotheworld,MarkTwainwasagreatAmericanwriter.
A、AsMoviegoersknowthatmanyspecialeffectsarecreatedbycomputers,theyoftendon'tknowisthatthesescenesstillrequirealotofwork.
Wheneverhecomestoourgarden,hecan’thelp_________theflowers.
Manycareersrequireacollegedegree;somejobs,________,onlyrequirepreviousexperience.
Youcan’timagine__________foolishlyhebehavedattheparty.
JonathanandJoeleftthehousetogofor__aftersupper.
