Don’t have the lights ______ all day long．It is a waste of electricity.
A．burn B．burned C．burning D．to burn
Either you or the headmaster ______ the prizes to the gifted students.
A．is handing out B．are to hand out C．are handing out D．is to hand out
The 2010 Shanghai World Expo is well worth ______.
A．visit B．visited C．to visit D．visiting
I am interested in traveling．It is ______ but ______.
A．interesting; tiring B．interested; tired
C．interesting; tired D．interested; tiring
The windows haven’t cleaned for a long time．They need ______.
A．to clean B．to be cleaned C．cleaning D．B and C
请根据下列提示的要点，以What will life be like without animals为题，介绍保护珍稀（rare）动物的意义及必要性。
1．动物是人类亲密的朋友，尤其是珍稀动物的存在使整个世界变得丰富多彩；
2．最近听到甚至动物园里的珍稀动物都遭到人为伤害，深表震惊。事件的发生源于有些人对保护动物认识不够及对动物漠不关心；
3．牢记保护珍稀动物是我们每个人的职责，我们应学习宣传（publicize）其意义，并采取积极有效措施。
要求：1．内容必须包括所有要点，可适当发挥；
2．词数100左右。
