Whydosomepeopl的精選

問題詳情：根據短文內容，從短文後的選項中選出能填入空白處的最佳選項。選項中有兩項為多餘選項。Whydosomepeoplehavemanyfriendswhileothersdonot?___1___However,itisnotso．Let’slookattwopsychologicalexperimentswh...