If I were you, I would not smoke.
我要是你的话，就不抽烟。
What can you make a person happy, in your opinion?

在你看来什么可以使一个人幸福呢？

What about reading loudly for half an hour everyday?

天天大声朗读三十分钟怎么样？

What do you think of Helen?

你认为Helen怎么样？

Would it be a good idea to tell him the truth?

把实情告诉他不好吗？