Sally:Hi,Dad.Howareyou?Dad:I’mfine,Sally.How’sthecourse...
问题详情：Sally:Hi,Dad.Howareyou?Dad:I’mfine,Sally.How’sthecoursegoing?Sally:It’sgoingwell,actually.I’menjoyingmymathcourseatthemoment,____61.____(main)becauseit’snotthatdifficult ____62.____(comp...