题目内容：

For people living in some remote villages in Indonesia, heating houses and fuelling stoves can be a real challenge. The resources required, like gas and wood, have to get shipped in and distributed to individual households.

The good news is that this antiquated system is now on its way out, thanks to an unlikely source: tofu. In Indonesia, tofu isn't just a snack——it's a necessity, with hundreds of small, family-run shops producing tofu in massive quantities every day. Now, thanks to a government-run program, the waste water from all that tofu production is getting transformed into biogas（沼气 ）that can be pumped directly to houses.

But how does it work? First, let's talk about tofu. Tofu has been made the same way for generations. Basically, producers start by soaking and grinding（磨）soybeans to separate the soy milk from the soy pulp. After the separated parts go through a filtration system（过滤系统）, the protein and oil are separated from the soy milk. A chemical coagulant（凝结剂） is added to firm everything up. Once formed, you have tofu ready for cutting. Though simple in practice, an enormous amount of water is required to make tofu - roughly 33 liters for every kilogram.

Researchers found that this waste water could be turned into biogas if a certain type of bacteria is added to it. Every day, the waste water is collected from various shops and treated with bacteria. Once transformed, the gas is pumped directly to local homes.

Besides creating a green energy source for locals, using all that waste water has significantly helped the local environment. The hope for Kalisari is to become the first full-blown green village in Indonesia. There's no reason why similar programs couldn’t sweep across the region, dramatically changing the way people get the energy they need to live out their lives.

1.What does the underlined word mean in paragraph2?

A. old-fashioned    B. modern

C. popular    D. effective

2.What is the right order to produce biogas from Tofu?

1.adding a chemical coagulant

2.separating the protein and oil from the soy milk

3.soaking and grinding soybean

4.pouring an enormous amount of water

A. 1    3   2    4

B. 3    2   1    4

C. 3    1   4    2

D. 2    1   3    4

3.Which are not the benefits of this new technique?

A. The waste water drained from the raw tofu can be reused.

B. The waterways and the rice fields are free from the danger of contaminating.

C. It can reduce the amount of water which is required to make tofu.

D. The transformed gas can be pumped directly to local homes.

4.What can we infer from the passage?

A. There is still a long way for Kalisari to become the first bull-blown green village.

B. This new program has the potential to be promoted.

C. The similar program can’t be applied in the different regions

D. The new energy makes little difference to the local people.