We must look into our population policy.look

The government will look into how to reduce unemployment.
政府将研究如何降低失业率.
我们必须研究我们的人口政策.
再问： Only take such clothes__really necessary. a.as were b.as they are c.as they were d.as are 为什么不选b选d? 谢谢~
再答： Only take such clothes__really necessary. a.as were b.as they are c.as they were d.as are such...as：像......一样...... such是形容词，后接名词，as是关系代词，引导定语从句，在定语从句中可充当主语、宾语、标语。 例： Let's discuss only such questions as concern every one of us. 我们只谈与我们每个人都有关的问题吧。(as做主语) Don't read such books as you can't understand. 不要看你们看不懂的书。（as作宾语） He isn't such aman as he used to be. 他已经不是过去那个样子了。(as作表语） Only take such clothes as are really necessary. 只带确实需要的衣服。（as 作主语）