托福词汇辅导：听力部分替换词汇2

 　　B
　　backpack ——> knapsack
　　be crowded ——> be well-attended
　　be done ——> complete
　　be free ——> not busy
　　be in one ear and out the other ——> doesn't listen
　　be onto something ——> promising
　　be overwhelmed with ——> be busy with
　　beach ——> seashore
　　best score ——> perfect grade
　　beyond sb. ——> not understand
　　big sale ——> discount