1. 我每天花两小时做作业。
   ________ two hours to do my homework.
2. 你看起来很疲惫，最好休息一下。
    You look tired, ________ have a rest.
3. 鸟巢太漂亮了，以至于很多外国人都来参观。
   The Bird Net is ________ many foreigners have come to visit it.
4. 对我来说算出这道数学题很难。
    ________ for me to work out the maths problem.
5. 如果你想把英语学好，你不仅要做大量的阅读，还要坚持用英语和别人交谈。
    If you want to learn English well, you should ________ in English.