TheoriginoftheAmericanpartysystemcanbetracedto________.
Veryfewpeopleunderstoodthiscontract,______wasveryobscure.
Iwasreallyanxiousaboutyou.You______homewithoutaword.
________，hehadnotimetorest.
Withsuchapoorscoreintheentranceexam，it’s________impossibleforhimtobeadmittedtothisuniversity.
