Singapore is not just a clean and tidy c

题目：

Singapore is not just a clean and tidy city in the world, it's also the greenest. There are (A) 三个原因why it is so.

Say "No" to waste

Singaporeans do not waste a single drop of water. They recycle water and save( B ) almost all rainfall. The water can be used for industry （工业） and even drinking.

Many "green" buildings

The Duke-NUS Graduate Medical School is one of the great examples of (C) pretty green design. It uses sustain-able design elements (可持续发展的设计元素) in its school building. ( D ) Singapore has many green buildings like this.

Get them while they're young

The Green Singapore 2050 (GS2050) is a community platform (社区平台) for young people to express their great worries about environmental problems, and think of solutions for(E) them. Why 2050'？It's because these young people will be the ones to run the country in 2050, and hopefully they will solve the world's problems.

小题1:将文中划线部分(A)译成英语。________________________

小题2:写出文中划线部分(B)和(C)的同义词或近义词。______________________

小题3:将文中划线部分(D)改写为There _______ many green buildings like this ______ Singapore.

小题4:文中划线部分(E)指代的是：__________________

小题5:从文中找出能说明本文主旨大意的中心词。_________________