1. In answer to these questions I either nodded or made strange noises.
    作为对这些问题的回答，我不是点头，就是发出奇怪的声音。

2. I could answer sixteen of the questions.
    我能回答其中的16道题。

3. If the "bad air" of swamps should be responsible, experiments would give the answer.
    如果沼泽湿地的“坏空气”有责任的话，那么实验会给出答案。

4. If the situation is unfamiliar, choose the answer closest to how you might react.
    如你不熟悉该情况，请选择最接近你可能作出的反应的答案。

5. It didn't take me long to lose my eagerness to answer questions.
    没有多久，我便不再渴望回答问题了。

6. I've helped them make persuasive presentations, answer unfriendly questions, communicate more effectively.
    我帮助他们，使他们所作的演讲有说服力，教他们如何回答不友好的提问，以及如何与人更有效地沟通。

7. Finally, he hit upon the answer.
    他终于想出了办法。