1. 微波炉可以用来煮饭。
    A microwave oven can _____  _____  _____ cooking.
2. 你必须亲自去签收，他们不能邮寄过来就算完事。
    You have to go sign for it _____  _____, they can't just mail it.
3. 人类怎么会说这么多种语言，这种情况是如何产生的呢？
    How did it _____  _____ that humans speak so many different languages?
4. 老师告诉我们噪音对我们的耳朵伤害很大。
    The teacher told us that noise _____ very _____  _____ our ears.
5. 在每一项发明被发明出来之前，爱迪生总要做大量的实验。
    Before each invention was invented, Thomas Edison always did _____  _____  _____  _____.

1. 微波炉可以用来煮饭。
    A microwave oven can _____ _____ _____ cooking.
2. 我们如何解决这个严重的问题？
    How do we _____ _____ the serious problem?
3. 至于索菲，她现在日子过得不错。
    _____ _____ Sophie, she is doing fine.
4. 老师告诉我们噪音对我们的耳朵伤害很大。
    The teacher told us that noise _____ very _____ _____ our ears.
5. 在每一项发明被发明出来之前，爱迪生总要做大量的实验。
    Before each invention was invented, Thomas Edison always did _____ _____ _____ _____.