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TOEFL听力疑难词组全攻略
1,a while back 不久以前,刚才
-Sam want to be able to play in the basketball game this week ,yeah he hurt his knee pretty badly a while back ,i don\'t why he didn\'t quit right away
2,about to 正要,正准备
-i am about to go swimming
3,according to 按照,根据
