The boy ran out of the classroom without the teacher's _______.
A、commandC
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Becareful,_______you'llfalldown.
Insomeschoolschildrenwhoprefertoreadbooksratherthan________footballbecomesocialoutcasts(被抛弃者).
________,Johnhasbeentoseveralforeigncountries.
She________hernervousnesstotheimportanceoftheinterview.
GeneralMotors,oneoftheworld'slargestautomanufacturers,isexpandingits________inthiscountry.