1. 从美国回来后，她还不时与房东在网上聊天。
   She chats with her host over Internet ________ after she came back from the USA.
2. 地震中受灾的孩子需要很多帮助，但最重要的是爱。
    The children who have suffered from the earthquake need plenty of help, but ________ they need love.
3. 免费塑料袋不再提供后，人们购物时要么自带袋子，要么花钱购买。
     Without free plastic bags offered, people either take their own bags ________ bags when they go shopping.
4. 我市政府设法确保本地儿童都能享受免费九年义务教育。
     The government of our city tries ________ that local children can enjoy a nine-year compulsory
    education for free.
5. 人们将永远记住那小女孩身处危险时的甜美微笑。
     The little girl ________ for ever by people for her sweet smile when she was in danger.