1. 到目前为止，他还没有完成好作业。
    _______  _______ he _______  _______ the homework.
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 _______  _______  _______ at 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 ________  ________  ________ forever by people for her sweet smile when she was in danger.

1. 你曾经看过音乐会吗？
    _____  you _____ _____ _____ a concert?
2. 前天我去看了国庆节音乐会。
    I _____ _____ the National Day concert the day before yesterday.
3. 我还从没有在别人面前唱过歌。
    I _____ _____ _____ in front of other people _____.
4. 到目前为止，他们写了多少首原创歌曲？
    _____  _____ original songs _____ they _____ so far?
5. 成功无捷径，我们只有一步一步往上爬。
    There is no elevator to success, so we'll have to climb the stairs _____ _____ _____.