1. you / an /exchange / refund ? / Would / like / a /or 2 classes / the morning / seven / start / their / at / in 3 depends / one of us / the survival / each and every / of / on / the natural world 4 English / communication / an / global / international / language / for / is 5 considerable progress / happy / Our parents / all of us / to hear / had made / were 6 HCM city/ is / The independence palace / a / historic site / famous / in 7 because of / natural disasters / around the world / Many people / their lives and home / have lost 8 good career / you / Being able / a forein language / to have / to speaks / gives / more good 9 The Mekong River / many different / kind of / home to / freshwater fish / is 10 a good dictionary / It is / with / to learn vocabulary / for us / easier 11 children / My sister / because / likes / she wants / a preschool teacher / to be 12 I / go swimming / when / I / was / used to / young 13 make / that / I / climate change / disappear / scared / losts of / am / will / animals 14 every day / they / have to / Students / electric appliances / leave / turn off / when / classrooms 15 her salary / she / very easily / can't / she / so little / that / earns / live on / money