Asisknowntousall,theage_____childrencangotoschoolisseven.
at which
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Someconceptsmaybedifficulttograspchieflybecausetheymaybeunfamiliaror_____ideas,opinionswhichwealreadyhold.
Yoursister_______tovisityouquiteofen,didn'tshe?
He paid the boy $10 for washing ten windows,most of ____ hadn't been cleaned for at least a year.
We'd better eliminate junk foods from our kitchen and keep a variety of high-quality foods_____ at all times.
Thedoctor____isleavingforAfricanextmonth.