what

Asking him what was wrong, I came to know that he had got a headache.
问他哪里不舒服，然后我才发现他头很痛。
来自：我和我三个同学的生活，如兄弟

Dams don't exist for ever, but what will replace them is not clear.
水坝不会永远存在下去，但它们将被何物取代目前尚不清楚。
来自：21世纪的水质

As an expert in English, what would you advise me to prepare for the contest?
作为英语这方面的专家，你能给我一些准备比赛的建议吗？
来自：一封求助信

Worst of all, if one takes exercise without taking in enough nutrition, his health will run down for malnutrition, which is just the opposite to what he wishes.
最糟糕的是，如果一个人在早上没有摄取足够的营养，那么他的健康状况会变得很差甚至导致营养不良，这绝对不是他所希望的。
来自：运动的积极和消积方面Positive and Negative Aspects of Sports

If we have spare time after supper, we may often communicate with each other and talk about what happened in the daytime.
如果晚餐之后我们有空闲时间，我们可以经常互相沟通和谈谈白天发生的事情。
来自：关于家庭的作文 To Make a Home Sweet

Through TV, people can learn what is happening across the world and are better informed of the latest development in science and technology.
通过电视，人们可以了解世界各地上正在发生的事情，并更好地了解科学技术上的最新发展情况。
来自：电视是福是祸TV: a Blessing or a Curse

It is due to what we have done to her.
这都是因为我们我们所作所为造成的。
来自：地球，我们的母亲The Earth——Our Mother

A life without a dream is like a bird with broken wings, confined to a cage and oblivious of what lies beyond the range of its vision.
一个没有梦想的生活就像是一只折翼的飞鸟，被囚禁在一个笼子，只能透过笼子看到目所能及的东西。
来自：一个梦想 A Dream

Fortunately a passer-by happened to see what had happened and remembered the number of the car.
幸运的是一名路人恰巧路过看到事情发展的经过，甚至还记住了汽车的车牌号。
来自：鸟飞向哪里 Where Did the Bird Fly?